CREDIT AGREEMENT dated as of January 27, 2011 among CARRIZO OIL & GAS, INC., as Borrower, BNP PARIBAS, as Administrative Agent, CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK and ROYAL BANK OF CANADA, as Co-Syndication Agents, CAPITAL ONE, N.A. and...

EXECUTION VERSION




	CREDIT AGREEMENT

	dated as of January 27, 2011

	among

	CARRIZO OIL & GAS, INC.,
	as Borrower,

	BNP PARIBAS,
	as Administrative Agent,

	CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK
	and
	ROYAL BANK OF CANADA,
	as Co-Syndication Agents,

	CAPITAL ONE, N.A.
	and
	COMPASS BANK,
	as Co-Documentation Agents,

	and

	The Lenders Party Hereto



	BNP PARIBAS SECURITIES CORP.
	Sole Lead Arranger and Sole Bookrunner

TABLE OF CONTENTS

Page

ARTICLE I

DEFINITIONS AND ACCOUNTING MATTERS

Section 1.01	Terms Defined Above	1
Section 1.02	Certain Defined Terms	1
Section 1.03	Types of Loans and Borrowings	25
Section 1.04	Terms Generally; Rules of Construction	25
Section 1.05	Accounting Terms and Determinations; GAAP	25

ARTICLE II

THE CREDITS

Section 2.01	Commitments	26
Section 2.02	Loans and Borrowings	26
Section 2.03	Requests for Borrowings	27
Section 2.04	Interest Elections	28
Section 2.05	Funding of Borrowings	29
Section 2.06	Termination and Reduction of Aggregate Maximum Credit Amounts	30
Section 2.07	Borrowing Base	31
Section 2.08	Letters of Credit	33

ARTICLE III

PAYMENTS OF PRINCIPAL AND INTEREST; PREPAYMENTS; FEES

Section 3.01	Repayment of Loans	38
Section 3.02	Interest	38
Section 3.03	Alternate Rate of Interest	39
Section 3.04	Prepayments	40
Section 3.05	Fees	42

ARTICLE IV

PAYMENTS; PRO RATA TREATMENT; SHARING OF SET-OFFS

Section 4.01	Prepayments Generally; Pro Rata Treatment; Sharing of Set-offs	43
Section 4.02	Presumption of Payment by the Borrower	44
Section 4.03	Payments and Deductions to a Defaulting Lender	44
Section 4.04	Disposition of Proceeds	46

ARTICLE V

INCREASED COSTS; BREAK FUNDING PAYMENTS; TAXES; ILLEGALITY

Section 5.01	Increased Costs	47
Section 5.02	Break Funding Payments	48
Section 5.03	Taxes	48
Section 5.04	Mitigation Obligations; Replacement of Lenders	50
Section 5.05	Illegality	51

Index

ARTICLE VI

CONDITIONS PRECEDENT

Section 6.01	Effective Date	52
Section 6.02	Each Credit Event	54

ARTICLE VII

REPRESENTATIONS AND WARRANTIES

Section 7.01	Organization; Powers	55
Section 7.02	Authority; Enforceability	55
Section 7.03	Approvals; No Conflict	55
Section 7.04	Financial Condition; No Material Adverse Change	56
Section 7.05	Litigation	56
Section 7.06	Environmental Matters	57
Section 7.07	Compliance with Laws; No Defualt	58
Section 7.08	Investment Company Act	58
Section 7.09	Taxes	58
Section 7.10	ERISA	59
Section 7.11	Disclosure; No Material Misstatements	59
Section 7.12	Insurance	60
Section 7.13	Restriction on Liens	60
Section 7.14	Subsidiaries	60
Section 7.15	Location of Business and Offices	60
Section 7.16	Properties; Titles, Etc.	61
Section 7.17	Maintenance of Properties	62
Section 7.18	Gas Imbalances Prepayments	62
Section 7.19	Marketing of Production	63
Section 7.20	Hedge Agreements	63
Section 7.21	Use of Loans and Letters of Credit	63
Section 7.22	Solvency	63

ARTICLE VIII

AFFIRMATIVE COVENANTS

Section 8.01	Financial Statements; Other Information	64
Section 8.02	Notices of Material Events	67
Section 8.03	Existence; Conduct of Business	67
Section 8.04	Payment of Taxes	68
Section 8.05	Operation and Maintenance of Properties	68
Section 8.06	Insurance	69
Section 8.07	Books and Records; Inspection Rights	69
Section 8.08	Compliance with Laws	69
Section 8.09	Environmental Matters	69
Section 8.10	Further Assurances	71
Section 8.11	Reserve Reports	71
Section 8.12	Title Information	72
Section 8.13	Additional Collateral; Additional Guarantors	73
Section 8.14	ERISA Compliance	74

Index

Section 8.15	Marketing Activities	75
Section 8.16	Unrestricted Subsidiaries	75

ARTICLE IX

NEGATIVE COVENANTS

Section 9.01	Financial Covenants	76
Section 9.02	Debt	76
Section 9.03	Liens	78
Section 9.04	Dividends, Distribution and Redemptions; Repayment of Senior Notes	78
Section 9.05	Investments, Loan and Advances	80
Section 9.06	Nature of Business	82
Section 9.07	Proceeds of Notes	83
Section 9.08	ERISA Compliance	83
Section 9.09	Sale or Discount of Receivables	83
Section 9.10	Mergers, Etc.	84
Section 9.11	Sale of Oil and Gas Properties	84
Section 9.12	Environmental Matters	85
Section 9.13	Transactions with Affiliates	85
Section 9.14	Negative Pledge Agreements; Dividend Restrictions	86
Section 9.15	Hedge Agreements	86
Section 9.16	Unrestricted Subsidiaries	88
Section 9.17	Gas Imbalances, Take-or-Pay or Other Prepayments	88

ARTICLE X

EVENTS OF DEFAULT; REMEDIES

Section 10.01	Events of Default	88
Section 10.02	Remedies	90

ARTICLE XI

THE AGENTS

Section 11.01	Appointment; Powers	92
Section 11.02	Duties and Obligations of Administrative Agent	92
Section 11.03	Action by Administrative Agent	93
Section 11.04	Reliance by Administrative Agent	93
Section 11.05	Subagents	94
Section 11.06	Resignation or Removal of Administrative Agent	94
Section 11.07	Agents as Lenders	94
Section 11.08	No Reliance	94
Section 11.09	Administrative Agent May File Proofs of Claim	95
Section 11.10	Authority of Administrative Agent to Release Collateral and Liens	96
Section 11.11	The Arranger, the Co-Syndication Agents and the Co-Documentation Agents	96

ARTICLE XII

MISCELLANEOUS

Section 12.01	Notices	96
Section 12.02	Waivers; Amendments	97

iii

Index

Section 12.03	Expenses, Indemnity; Damage Waiver	98
Section 12.04	Successors and Assigns	101
Section 12.05	Survival; Revival; Reinstatement	104
Section 12.06	Counterparts; Integration; Effectiveness	104
Section 12.07	Severability	105
Section 12.08	Right of Setoff	105
Section 12.09	GOVERNING LAW; JURISDICTION; CONSENT TO SERVICE OF PROCESS	105
Section 12.10	Headings	107
Section 12.11	Confidentiality	107
Section 12.12	Interest Rate Limitation	107
Section 12.13	Collateral Matters; Hedge Agreements	108
Section 12.14	No Third Party Beneficiaries	109
Section 12.15	USA Patriot Act Notice	109
Section 12.16	EXCULPATION PROVISIONS	109

Index

ANNEXES, EXHIBITS AND SCHEDULES

Annex I	List of Maximum Credit Amounts

Exhibit A	Form of Note
Exhibit B	Form of Borrowing Request
Exhibit C	Form of Interest Election Request
Exhibit D	Form of Compliance Certificate
Exhibit E	Form of Legal Opinion of Xxxxx Xxxxx L.L.P., special counsel to the Borrower
Exhibit F-1	Security Instruments
Exhibit F-2	Form of Guaranty and Pledge Agreement
Exhibit G	Form of Assignment and Assumption
Exhibit H	Form of Reserve Report Certificate


Schedule 1.02	Approved Counterparties
Schedule 7.05	Litigation
Schedule 7.06	Environmental Matters
Schedule 7.10(e)	ERISA Matters
Schedule 7.14	Subsidiaries and Partnerships
Schedule 7.15	Location of Subsidiaries
Schedule 7.18	Gas Imbalances
Schedule 7.19	Marketing Contracts
Schedule 7.20	Hedge Agreements
Schedule 9.02	Existing Debt
Schedule 9.03	Existing Liens
Schedule 9.05	Existing Investments
Schedule 9.08(c)	ERISA Compliance Matters
Schedule 9.13	Affiliate Transactions

Index

THIS CREDIT AGREEMENT dated as of January 27, 2011 is among: Carrizo Oil & Gas, Inc., a corporation duly formed and existing under the laws of the State of Texas (the “Borrower”); each of the Lenders from time to time party hereto; BNP Paribas (in its individual capacity, “BNP”), as administrative agent for the Lenders (in such capacity, together with its successors in such capacity, the “Administrative Agent”); Credit Agricole Corporate and Investment Bank and Royal Bank of Canada, as co-syndication agents for the Lenders (each in such capacity, together with its successors in such capacity, a “Co-Syndication Agent” and, collectively, the “Co-Syndication Agents”); and Capital One, N.A. and Compass Bank, as co-documentation agents for the Lenders (each in such capacity, together with its successors in such capacity, a “Co-Documentation Agent” and, collectively, the “Co-Documentation Agents”).

R E C I T A L S

A. The Borrower has requested that the Lenders provide certain loans to and extensions of credit on behalf of the Borrower.

B. The Lenders have agreed to make such loans and extensions of credit subject to the terms and conditions of this Agreement.

C. In consideration of the mutual covenants and agreements herein contained and of the loans, extensions of credit and commitments hereinafter referred to, the parties hereto agree as follows:

ARTICLE I

Definitions and Accounting Matters

Section 1.01 Terms Defined Above. As used in this Agreement, each term defined above has the meaning indicated above.

Section 1.02 Certain Defined Terms. As used in this Agreement, the following terms have the meanings specified below:

“ABR”, when used in reference to any Loan or Borrowing, refers to whether such Loan, or the Loans comprising such Borrowing, are bearing interest at a rate determined by reference to the Alternate Base Rate.

“Adjusted LIBO Rate” means, with respect to any Eurodollar Borrowing for any Interest Period, an interest rate per annum (rounded upwards, if necessary, to the next 1/100 of 1%) equal to the LIBO Rate for such Interest Period multiplied by the Statutory Reserve Rate.

“Administrative Questionnaire” means an Administrative Questionnaire in a form supplied by the Administrative Agent.

“Affected Loans” has the meaning assigned such term in Section 5.05.

“Affiliate” means, with respect to a specified Person, another Person that directly, or indirectly through one or more intermediaries, Controls or is Controlled by or is under common Control with the Person specified.

Index

“Agents” means, collectively, the Administrative Agent, the Co-Syndication Agents and the Co-Documentation Agents; and “Agent” shall mean either the Administrative Agent, any Co-Syndication Agent or any Co-Documentation Agent, as the context requires.

“Aggregate Maximum Credit Amounts” at any time shall equal the sum of the Maximum Credit Amounts, as the same may be reduced or terminated pursuant to Section 2.06.

“Agreement” means this Credit Agreement, as the same may from time to time be amended, modified, supplemented or restated.

“Alternate Base Rate” means, for any day, a rate per annum equal to the greatest of (a) the Prime Rate in effect on such day, (b) the Federal Funds Effective Rate in effect on such day plus ½ of 1.0% and (c) the Adjusted LIBO Rate for a three month Interest Period on such day (or if such day is not a Business Day, the immediately preceding Business Day) plus 1.0%. Any change in the Alternate Base Rate due to a change in the Prime Rate, the Federal Funds Effective Rate or the Adjusted LIBO Rate shall be effective from and including the effective date of such change in the Prime Rate, the Federal Funds Effective Rate or the Adjusted LIBO Rate, respectively.

“Applicable Margin” means, for any day, with respect to any ABR Loan or Eurodollar Loan, as the case may be, the rate per annum set forth in the Borrowing Base Utilization Grid below based upon the Borrowing Base Utilization Percentage then in effect:

Borrowing Base Utilization Grid
Borrowing Base Utilization Percentage	<25%	³ 25% but <50%	³ 50% but <75%	³ 75% but <90%	³ 90%
Eurodollar Loans	2.00%	2.25%	2.50%	2.75%	3.00%
ABR Loans	1.00%	1.25%	1.50%	1.75%	2.00%

Each change in the Applicable Margin shall apply during the period commencing on the effective date of such change and ending on the date immediately preceding the effective date of the next such change, provided, however, that if at any time the Borrower fails to deliver a Reserve Report required to be delivered pursuant to Section 8.11(a), and for each day during the period from and including the date on which such Reserve Report was required to be delivered to but excluding the date on which such Reserve Report is delivered, the “Applicable Margin” means the rate per annum set forth on the above Borrowing Base Utilization Grid when the Borrowing Base Utilization Percentage is at its highest level.

“Applicable Percentage” means, with respect to any Lender at any time, the percentage of the Aggregate Maximum Credit Amounts represented by such Lender’s Maximum Credit Amount at such time; provided that if the Commitments have terminated or expired, the Applicable Percentages shall be determined based upon the Commitments most recently in effect; provided further that, at any time that a Defaulting Lender shall exist, “Applicable Percentage” shall mean the percentage of the Aggregate Maximum Credit Amounts (disregarding any Defaulting Lenders’ Maximum Credit Amounts at such time) represented by

Index

such Lender’s Maximum Credit Amount at such time. The Applicable Percentages of the Lenders as of the Effective Date are set forth on Annex I.

“Approved Counterparty” means (a) any Lender or any Affiliate of a Lender, (b) any other Person whose long term senior unsecured debt rating is A-/A3 by S&P or Xxxxx’x (or their equivalent) or higher (at the time the Hedge Agreement is entered into) and (c) any other Person listed on Schedule 1.02.

“Approved Fund” means any Person (other than a natural person) that is engaged in making, purchasing, holding or investing in bank loans and similar extensions of credit in the ordinary course of its business and that is administered or managed by (a) a Lender, (b) an Affiliate of a Lender or (c) an entity or an Affiliate of an entity that administers or manages a Lender.

“Approved Petroleum Engineers” means (a) Netherland, Xxxxxx & Associates, Inc., (b) Xxxxx Xxxxx Company, L.P., (c) Xxxxxx, Xxxxxxxxx & Associates, Inc., (d) Xxxxxxxxx and Xxxxx, Inc. (e) XxXxxxxx and XxxXxxxxxxx, (f) XxXxxxx Petroleum Consultants Ltd. and (g) any other independent petroleum engineers reasonably acceptable to the Administrative Agent.

“Arranger” means BNP Paribas Securities Corp., in its capacities as the sole lead arranger and sole bookrunner hereunder.

“Assignment and Assumption” means an assignment and assumption entered into by a Lender and an assignee (with the consent of any party whose consent is required by Section 12.04(b)), and accepted by the Administrative Agent, in the form of Exhibit G or any other form approved by the Administrative Agent.

“Availability” means, at any time, the amount by which the Borrowing Base exceeds the total Revolving Credit Exposures at such time.

“Availability Period” means the period from and including the Effective Date to but excluding the Termination Date.

“Avista” means Avista Capital Partners II, L.P., a Delaware limited partnership, and its successors and permitted assigns.

“Avista JV Partner” means ACP II Marcellus LLC, a Delaware limited liability company, and its successors and permitted assigns.

“Avista Marcellus Joint Venture” means that certain joint venture between Carrizo (Marcellus) LLC (or other wholly owned Subsidiaries of the Company), Avista Capital Partners II, L.P. and Avista JV Partner pursuant to that certain Amended and Restated Participation Agreement effective as of October 1, 2010 and the other documents delivered in connection therewith, in each case as in effect on the Effective Date, together with (i) any amendments, restatements, supplements or other modifications thereto made after the Effective Date and (ii) any other documents delivered in connection therewith after the Effective Date that, in each case, are not materially adverse to the Lenders.

Index

“Board” means the Board of Governors of the Federal Reserve System of the United States of America or any successor Governmental Authority.

“Borrowing” means Loans of the same Type, made, converted or continued on the same date and, in the case of Eurodollar Loans, as to which a single Interest Period is in effect.

“Borrowing Base” means at any time an amount equal to the amount determined in accordance with Section 2.07, as the same may be adjusted from time to time pursuant to Sections 2.07(e), 2.07(f), 8.12(c) or 9.11.

“Borrowing Base Deficiency” occurs if at any time the total Revolving Credit Exposures exceeds the Borrowing Base then in effect.

“Borrowing Base Utilization Percentage” means, as of any day, the fraction expressed as a percentage, the numerator of which is the sum of the Revolving Credit Exposures of the Lenders on such day, and the denominator of which is the Borrowing Base in effect on such day.

“Borrowing Request” means a request by the Borrower for a Borrowing in accordance with Section 2.03.

“Business Day” means any day that is not a Saturday, Sunday or other day on which commercial banks in Houston, Texas are authorized or required by law to remain closed; and if such day relates to a Borrowing or continuation of, a payment or prepayment of principal of or interest on, or a conversion of or into, or the Interest Period for, a Eurodollar Loan or a notice by the Borrower with respect to any such Borrowing or continuation, payment, prepayment, conversion or Interest Period, any day which is also a day on which banks are open for dealings in dollar deposits in the London interbank market.

“Capital Leases” means, in respect of any Person, all leases which shall have been, or should have been, in accordance with GAAP, recorded as capital leases on the balance sheet of the Person liable (whether contingent or otherwise) for the payment of rent thereunder.

“Carrizo UK Facility” means that certain $84,000,000 Senior Secured Multicurrency Credit Facility Agreement, to be dated on or about January 28, 2011, among the Borrower, as parent, Carrizo UK Huntington, as borrower, and, in various capacities, BNP Paribas and Societe Generale.

“Carrizo UK Huntington” means Carrizo UK Huntington Ltd, a company incorporated under the laws of England and Wales.

“Carrizo UK Huntington Project” means the development, operation and related financing of the Huntington Petroleum Field and the facilities and infrastructure associated therewith, including the floating production and storage and offloading facility, by Carrizo UK Huntington.

“Change in Control” means (a) the acquisition of ownership, directly or indirectly, beneficially or of record, by any Person or “group” (within the meaning of Rule 13d-5 of the Securities Exchange Act of 1934 and the rules of the SEC thereunder as in effect on the date

Index

hereof), of Equity Interests representing more than fifty percent (50.0%) of the aggregate ordinary voting power represented by the issued and outstanding Equity Interests of the Borrower, (b) occupation of a majority of the seats (other than vacant seats) on the board of directors of the Borrower by Persons who were neither (i) nominated by the board of directors of the Borrower nor (ii) appointed by directors so nominated or (c) any “change in control” (or other similar event, howsoever designated) shall occur under (and not be waived in accordance with) any of the Senior Notes.

“Change in Law” means (a) the adoption of any law, rule or regulation by any Governmental Authority after the date of this Agreement, (b) any change in any law, rule or regulation or in the interpretation or application thereof by any Governmental Authority after the date of this Agreement or (c) compliance by any Lender or the Issuing Bank (or, for purposes of Section 5.01(b)), by any lending office of such Lender or by such Lender’s or the Issuing Bank’s holding company, if any) with any request, guideline or directive (whether or not having the force of law) of any Governmental Authority made or issued after the date of this Agreement; provided that notwithstanding anything herein to the contrary, the Xxxx-Xxxxx Xxxx Street Reform and Consumer Protection Act and all requests, rules, guidelines or directives issued thereunder or in connection therewith by a Governmental Authority and resulting in additional costs or limitations on the making, maintenance or pricing of loans or the participation in, or issuance or maintenance of, letters of credit, shall be deemed to be a “Change in Law”, regardless of the date enacted, adopted or issued.

“Code” means the Internal Revenue Code of 1986, as amended from time to time, and any successor statute.

“Commitment” means, with respect to each Lender, the commitment of such Lender to make Loans and to acquire participations in Letters of Credit hereunder, expressed as an amount representing the maximum aggregate amount of such Lender’s Revolving Credit Exposure hereunder, as such commitment may be (a) modified from time to time pursuant to Section 2.06 and (b) modified from time to time pursuant to assignments by or to such Lender pursuant to Section 12.04(b). The amount representing each Lender’s Commitment shall at any time be the lesser of such Lender’s Maximum Credit Amount and such Lender’s Applicable Percentage of the then effective Borrowing Base.

“Consolidated Net Income” means, for any period, the aggregate of the net income (or loss) of the Borrower and the Consolidated Subsidiaries after allowances for taxes for such period determined on a consolidated basis in accordance with GAAP; provided that there shall be excluded from such net income (to the extent otherwise included therein) the following (without duplication): (a) the net income of any Person (including any Unrestricted Subsidiary) in which the Borrower or any Consolidated Subsidiary has an interest (which interest does not cause the net income of such other Person to be consolidated with the net income of the Borrower and the Consolidated Subsidiaries in accordance with GAAP), except to the extent of the amount of dividends or distributions actually paid in cash during such period by such other Person to the Borrower or to a Consolidated Subsidiary, as the case may be (it being understood that any cash distributions received by the Borrower or any of the Restricted Subsidiaries in respect of its profit interests in Avista JV Partner shall be included in the calculation of Consolidated Net Income for any period of determination to the extent such cash distributions were so received

Index

during such period); (b) the net income (but not loss) during such period of any Consolidated Subsidiary to the extent that the declaration or payment of dividends or similar distributions or transfers or loans by such Consolidated Subsidiary is not at the time permitted by operation of the terms of its charter or any agreement, instrument or Governmental Requirement applicable to such Consolidated Subsidiary or is otherwise restricted or prohibited, in each case determined in accordance with GAAP; (c) the net income (or loss) of any Person acquired in a pooling-of-interests transaction for any period prior to the date of such transaction; (d) any extraordinary non-cash gains or losses during such period and (e) any gains or losses attributable to writeups or writedowns of assets, including ceiling test writedowns; and provided further that if, during such period, (i) the Borrower or any Consolidated Subsidiary shall acquire or dispose of any proved producing Oil and Gas Properties in a transaction involving aggregate consideration in an amount in excess of 2% of the Borrower’s proved oil and natural gas properties asset balance as of the end of the most recently ended fiscal quarter or fiscal year for which financial statements have been delivered pursuant to Section 8.01(a) or 8.01(b), as the case may be, or (ii) a Subsidiary which, together with its Subsidiaries, owns proved producing Oil and Gas Properties which represent more than 2% of the Borrower’s proved oil and natural gas properties asset balance as of the end of the most recently ended fiscal quarter or fiscal year for which financial statements have been delivered pursuant to Section 8.01(a) or 8.01(b), as the case may be, shall be redesignated as either an Unrestricted Subsidiary or a Restricted Subsidiary, then Consolidated Net Income shall be calculated after giving pro forma effect to such acquisition, disposition or redesignation, as if such acquisition, disposition or redesignation had occurred on the first day of such period. For the avoidance of doubt, the aggregate of the net income (or loss) attributable to any Unrestricted Subsidiaries shall be excluded in calculating Consolidated Net Income except as otherwise provided in clause (a) of the preceding sentence.

“Consolidated Subsidiaries” means each Restricted Subsidiary of the Borrower (whether now existing or hereafter created or acquired) the financial statements of which are consolidated with the financial statements of the Borrower in accordance with GAAP.

“Control” means the possession, directly or indirectly, of the power to direct or cause the direction of the management or policies of a Person, whether through the ability to exercise voting power, by contract or otherwise. “Controlling” and “Controlled” have meanings correlative thereto.

“Credit Parties” means, collectively, the Borrower and the Guarantors, and “Credit Party” means any of them.

“Current Production” means, for each month, the lesser of (a) the highest of the most recent three (3) prior month’s production volume of crude oil, natural gas liquids and natural gas, of the Borrower and the Restricted Subsidiaries and (b) the internally forecasted production of crude oil and natural gas, calculated on a natural gas equivalent basis, of the Borrower and the Restricted Subsidiaries for each month for the next 48 months.

“Debt” means, for any Person, the sum of the following (without duplication): (a) all obligations of such Person for borrowed money or evidenced by bonds, bankers’ acceptances, debentures, notes or other similar instruments; (b) all obligations of such Person (whether contingent or otherwise) in respect of letters of credit, surety or other bonds and similar

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instruments; (c) all obligations of such Person to pay the deferred purchase price of Property or services (other than (i) accrued pension costs and other employee benefit and compensation obligations arising in the ordinary course of business and (ii) accounts payable incurred in the ordinary course of business which are either (x) current or (y) being contested in good faith by appropriate action and for which adequate reserves have been maintained in accordance with GAAP); (d) all obligations under Capital Leases; (e) all obligations under Synthetic Leases; (f) all Debt (as defined in the other clauses of this definition) of others secured by (or for which the holder of such Debt has an existing right, contingent or otherwise to be secured by) a Lien on any Property of such Person, whether or not such Debt has been assumed by such Person, provided that the amount of Debt for purposes of clause (f) shall be an amount equal to the lesser of the unpaid amount of such Debt and the fair market value of the encumbered Property; (g) all Debt (as defined in the other clauses of this definition) of others guaranteed by such Person or in respect of which such Person otherwise assures a creditor against loss of the Debt (howsoever such assurance shall be made) to the extent of the lesser of the amount of such Debt and the maximum stated amount of such guarantee or assurance against loss; (h) obligations to deliver commodities, goods or services, including, without limitation, Hydrocarbons, in consideration of one or more advance payments (but only to the extent of such advance payments and only to the extent such commodities, goods or services have not been delivered), other than gas balancing arrangements in the ordinary course of business; (i) any Debt of a partnership for which such Person is liable either by agreement, by operation of law or by a Governmental Requirement but only to the extent of such liability; (j) Disqualified Capital Stock of such Person; and (k) the undischarged balance of any production payment created by such Person or for the creation of which such Person directly or indirectly received payment. The Debt of any Person shall include all obligations of such Person of the character described above to the extent such Person remains legally liable in respect thereof notwithstanding that any such obligation is not included as a liability of such Person under GAAP.

“Default” means any event or condition which constitutes an Event of Default or which upon notice, lapse of time or both would, unless cured or waived, become an Event of Default.

“Defaulting Lender” means any Lender that has (a) failed to fund any portion of its Loans or participations in Letters of Credit within three (3) Business Days of the date required to be funded by it hereunder, (b) notified the Borrower, the Administrative Agent, the Issuing Bank or any Lender in writing that it does not intend to comply with any of its funding obligations under this Agreement or has made a public statement to the effect that it does not intend to comply with its funding obligations under this Agreement, (c) failed, within three (3) Business Days after request by the Administrative Agent or the Borrower, to confirm that it will comply with the terms of this Agreement relating to its obligations to fund prospective Loans and participations in then outstanding Letters of Credit, (d) otherwise failed to pay over to the Administrative Agent or any other Lender any other amount required to be paid by it hereunder within three Business Days of the date when due, unless the subject of a good faith dispute, or (e) become the subject of a bankruptcy or insolvency proceeding, or has had a receiver, conservator, trustee or custodian appointed for it, or has a parent company that has become the subject of a bankruptcy or insolvency proceeding, or has had a receiver, conservator, trustee or custodian appointed for it or, in the good faith determination of the Administrative Agent or the Borrower, has taken any action in furtherance of, or indicating its consent to, approval of, or acquiescence in, any such proceeding or appointment; provided that a Lender shall not become a Defaulting Lender solely

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as the result of the acquisition or maintenance of an ownership interest in such Lender or any Person controlling such Lender or the exercise of control over such Lender or any Person controlling such Lender by a Governmental Authority or an instrumentality thereof.

“Disqualified Capital Stock” means any Equity Interest that, by its terms (or by the terms of any security into which it is convertible or for which it is exchangeable) or upon the happening of any event, matures or is mandatorily redeemable for any consideration other than other Equity Interests (which would not constitute Disqualified Capital Stock), pursuant to a sinking fund obligation or otherwise, or is convertible or exchangeable for Debt or redeemable for any consideration other than other Equity Interests (which would not constitute Disqualified Capital Stock) at the option of the holder thereof, in whole or in part, on or prior to the date that is 91 days after the earlier of (a) the Maturity Date and (b) the date on which there are no Loans, LC Exposure or other obligations outstanding under this Agreement and all of the Commitments are terminated.

“dollars” or “$” refers to lawful money of the United States of America.

“Domestic Subsidiary” means any Restricted Subsidiary that is organized under the laws of the United States of America or any state thereof or the District of Columbia.

“EBITDAX” means, for any period, the sum of (a) Consolidated Net Income for such period, plus (b) the following expenses or charges to the extent deducted in calculating Consolidated Net Income for such period (without duplication): interest expense, income taxes, depreciation, depletion, amortization, exploration expenses, all non-cash charges arising from the write-off of intangible assets and all other noncash charges or expenses, minus (c) all noncash income included in the calculation of Consolidated Net Income for such period.

“Effective Date” means the date on which the conditions specified in Section 6.01 are satisfied (or waived in accordance with Section 12.02).

“Engineering Reports” has the meaning assigned such term in Section 2.07(c)(i).

“Environmental Laws” means any and all Governmental Requirements pertaining in any way to health, safety, the environment, the preservation or reclamation of natural resources, or the management, Release or threatened Release of any Hazardous Materials, in effect in any and all jurisdictions in which the Borrower or any other Credit Party is conducting, or at any time has conducted, business, or where any Property of the Borrower or any other Credit Party is located, including, the Oil Pollution Act of 1990 (“OPA”), as amended, the Clean Air Act, as amended, the Comprehensive Environmental, Response, Compensation, and Liability Act of 1980 (“CERCLA”), as amended, the Federal Water Pollution Control Act, as amended, the Occupational Safety and Health Act of 1970, as amended, the Resource Conservation and Recovery Act of 1976 (“RCRA”), as amended, the Safe Drinking Water Act, as amended, the Toxic Substances Control Act, as amended, the Superfund Amendments and Reauthorization Act of 1986, as amended, the Hazardous Materials Transportation Law, as amended, and other environmental conservation or protection Governmental Requirements.

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“Environmental Permit” means any permit, registration, license, approval, consent, exemption, variance, or other authorization required under or issued pursuant to applicable Environmental Laws.

“Equity Interests” means shares of capital stock, partnership interests, membership interests in a limited liability company, beneficial interests in a trust or other equity ownership interests in a Person, and any warrants, options or other rights entitling the holder thereof to purchase or acquire any such Equity Interest (other than any Debt security which by its terms is convertible at the option of the holder into Equity Interests).

“ERISA” means the Employee Retirement Income Security Act of 1974, as amended, and any successor statute.

“ERISA Affiliate” means each trade or business (whether or not incorporated) which together with the Borrower or any other Credit Party would be deemed to be a “single employer” within the meaning of section 4001(b)(1) of ERISA or subsections (b), (c), (m) or (o) of section 414 of the Code.

“Eurodollar”, when used in reference to any Loan or Borrowing, refers to whether such Loan, or the Loans comprising such Borrowing, are bearing interest at a rate determined by reference to the Adjusted LIBO Rate.

“Event of Default” has the meaning assigned such term in Section 10.01.

“Excepted Liens” means: (a) Liens on any Property, including Oil and Gas Properties, for Taxes, assessments or other governmental charges or levies which are not delinquent or which are being contested in good faith by appropriate action and for which adequate reserves have been maintained in accordance with GAAP; (b) Liens in connection with workers’ compensation, unemployment insurance or other social security, old age pension or public liability obligations; (c) statutory landlord’s liens, operators’, vendors’, carriers’, warehousemen’s, repairmen’s, mechanics’, suppliers’, workers’, materialmen’s, construction, customs authorities or other like Liens on Property (including Oil and Gas Properties), arising by operation of law in the ordinary course of business or incident to the exploration, development, operation and maintenance of Oil and Gas Properties each of which is in respect of obligations that are not more than 90 days past due or which are being contested in good faith by appropriate action and for which adequate reserves have been maintained in accordance with GAAP; (d) the terms of the oil and gas leases and lease burdens payable to third parties which are deducted in the calculation of discounted present value in any Reserve Report including, without limitation, any royalty, overriding royalty, net profits interest, production payment, carried interest or reversionary working interest; (e) contractual Liens on Property (including Oil and Gas Properties), which arise in the ordinary course of business under operating agreements, joint venture agreements, oil and gas partnership agreements, oil and gas leases, farm-out agreements, division orders, contracts for the sale, transportation or exchange of oil and natural gas, unitization and pooling declarations and agreements, area of mutual interest agreements, overriding royalty agreements, marketing agreements, processing agreements, net profits agreements, development agreements, gas balancing or deferred production agreements, injection, repressuring and recycling agreements, salt water or other disposal agreements, seismic

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or other geophysical permits or agreements, and other agreements which are usual and customary in the oil and gas business and are for claims which are not delinquent or which are being contested in good faith by appropriate action and for which adequate reserves have been maintained in accordance with GAAP, provided that any such Lien referred to in this clause does not materially impair the use of the Property covered by such Lien for the purposes for which such Property is held by the Borrower or any Restricted Subsidiary or materially impair the value of such Property subject thereto; (f) Liens arising solely by virtue of any statutory or common law provision relating to banker’s liens, rights of set-off or similar rights and remedies (including any such banker’s liens, rights of set-off or similar rights and remedies that are contractually agreed upon in deposit account agreements, securities account agreements or commodities account agreements entered into in the ordinary course of business) and burdening only deposit accounts or other funds maintained with a creditor depository institution, provided that no such deposit account is a dedicated cash collateral account or is subject to restrictions against access by the depositor in excess of those set forth by regulations promulgated by the Board and no such deposit account is intended by the Borrower or any other Credit Party to provide collateral to the depository institution; (g) easements, restrictions, servitudes, permits, conditions, covenants, exceptions or reservations in any Property, including any Oil and Gas Property, of the Borrower or any Restricted Subsidiary for the purpose of roads, pipelines, transmission lines, transportation lines, distribution lines for the removal of gas, oil, coal or other minerals or timber, and other like purposes, or for the joint or common use of real estate, zoning restrictions, rights of way, facilities and equipment, that do not secure any monetary obligations and which in the aggregate do not materially impair the use of such Property for the purposes of which such Property is held by the Borrower or any Restricted Subsidiary or materially impair the value of such Property subject thereto; (h) Liens on cash or securities pledged to secure performance of tenders, surety and appeal bonds, government contracts, performance and return of money bonds, bids, trade contracts, leases, statutory obligations, regulatory obligations and other obligations of a like nature incurred in the ordinary course of business; (i) judgment and attachment Liens on any Property, including Oil and Gas Properties, not giving rise to an Event of Default; (j) consents to assignment, preferential rights to purchase, and similar contractual provisions regarding Oil and Gas Properties; (k) the rights of farmees and similar Persons who have a right to acquire a working interest in Oil and Gas Properties of the Borrower or any of the Restricted Subsidiaries, to the extent disclosed in the most recently delivered Reserve Report; (l) unsubordinated mortgages granted by lessors on Property with respect to which the Borrower or any of the Restricted Subsidiaries owns a Hydrocarbon Interest to the extent such mortgage does not cover any tract of land under which a wellbore is located and (m) Liens on Property, including Oil and Gas Properties, arising from precautionary UCC filings; provided, further that no intention to subordinate the first priority Lien granted in favor of the Administrative Agent and the Lenders is to be hereby implied or expressed by the permitted existence of such Excepted Liens.

“Exchange Offer” means a registered offer to exchange outstanding Senior Notes for new Senior Notes (the “exchange notes”) having terms substantially identical in all material respects to such outstanding Senior Notes (except that the exchange notes shall not contain any transfer restrictions).

“Excluded Taxes” means, with respect to the Administrative Agent, any Lender, the Issuing Bank or any other recipient of any payment to be made by or on account of any

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obligation of the Borrower or any Guarantor hereunder or under any other Loan Document, (a) income or franchise taxes imposed on (or measured by) its net income by the United States of America or such other jurisdiction under the laws of which such recipient is organized or in which its principal office is located or, in the case of any Lender, in which its applicable lending office is located, (b) any branch profits taxes imposed by the United States of America or any similar tax imposed by any other jurisdiction in which the Borrower or any Guarantor is located, (c) taxes imposed as a result of a present or former connection between the recipient and the taxing jurisdiction (other than connections arising from such recipient having executed, delivered, become a party to, performed its obligations under, received payments under, received or perfected a security interest under, engaged in any other transaction pursuant to or enforced any Loan Document, or sold or assigned an interest in any Loan or Loan Document), (d) any backup withholding tax that is withheld from amounts payable to a Lender that has failed to comply with Section 5.03(e), (e) in the case of a Foreign Lender other than an assignee under Section 5.04(a), any withholding tax that is imposed on amounts payable to such Foreign Lender at the time such Foreign Lender becomes a party to this Agreement (or designates a new lending office) or is attributable to such Foreign Lender’s failure or inability to comply with Section 5.03(e), except to the extent that such Foreign Lender (or its assignor, if any) was entitled, at the time of designation of a new lending office (or assignment), to receive additional amounts with respect to such withholding tax pursuant to Section 5.03(a) or Section 5.03(b), and (f) in the case of any Lender, any withholding taxes that are attributable to such Lender’s failure to comply with FATCA.

“Existing 2018 Notes” means the Borrower’s 8.625% Senior Notes due 2018 issued pursuant to the Existing 2018 Notes Indenture, the aggregate outstanding principal amount of which as of the Effective Date is $400,000,000.

“Existing 2018 Notes Indenture” means that certain Indenture dated as of May 28, 2008 among the Borrower, certain Subsidiaries of the Borrower and Xxxxx Fargo Bank, National Association, as trustee, as supplemented by the Fourth Supplemental Indenture dated as of November 2, 2010, and as the same may be amended, restated, modified or further supplemented from time to time (to the extent such amendment, restatement, modification or supplement is applicable to the Existing 2018 Notes) in accordance with the terms of this Agreement.

“Existing Convertible Notes” means the Borrower’s 4.375% Convertible Senior Notes due 2028 issued on May 28, 2008 pursuant to the Convertible Notes Indenture, the aggregate outstanding principal amount of which as of the Effective Date is $73,750,000.

“Existing Convertible Notes Indenture” means that certain Indenture dated as of May 28, 2008 among the Borrower, certain Subsidiaries of the Borrower and Xxxxx Fargo Bank, National Association, as trustee, as supplemented by the First Supplemental Indenture dated as of May 28, 2008, the Second Supplemental Indenture dated as of May 14, 2009, the Fifth Supplemental Indenture dated as of November 2, 2010, and as the same may be amended, restated, modified or further supplemented from time to time (to the extent such amendment, restatement, modification or supplement is applicable to the Convertible Notes) in accordance with the terms of this Agreement.

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“Existing Credit Agreement” means that certain Credit Agreement dated as of May 25, 2006 among the Borrower, Xxxxx Fargo Bank, N.A., as administrative agent, and others as guarantors, agents and lenders, as amended.

“Existing Senior Notes” means the Existing Convertible Notes and the Existing 2018 Notes.

“FATCA” shall mean Sections 1471 through 1474 of the Code, as of the date of this Agreement, and any current or future regulations or official interpretations thereof.

“Federal Funds Effective Rate” means, for any day, the weighted average (rounded upwards, if necessary, to the next 1/100 of 1%) of the rates on overnight Federal funds transactions with members of the Federal Reserve System arranged by Federal funds brokers, as published on the next succeeding Business Day by the Federal Reserve Bank of New York, or, if such rate is not so published for any day that is a Business Day, the average (rounded upwards, if necessary, to the next 1/100 of 1%) of the quotations for such day for such transactions received by the Administrative Agent from three Federal funds brokers of recognized standing selected by it.

“Financial Officer” means, for any Person, the chief financial officer, principal accounting officer, treasurer or controller of such Person. Unless otherwise specified, all references herein to a Financial Officer means a Financial Officer of the Borrower.

“Financial Statements” means the financial statement or statements of the Borrower and its Consolidated Subsidiaries referred to in Section 7.04(a).

“Foreign Lender” means any Lender that is organized under the laws of a jurisdiction other than that in which the Borrower is located. For purposes of this definition, the United States of America, each State thereof and the District of Columbia shall be deemed to constitute a single jurisdiction.

“Foreign Subsidiary” means any Restricted Subsidiary that is not a Domestic Subsidiary.

“GAAP” means generally accepted accounting principles in the United States of America as in effect from time to time subject to the terms and conditions set forth in Section 1.05.

“Governmental Authority” means the government of the United States of America or any other nation or any political subdivision thereof, whether state or local, and any agency, authority, instrumentality, regulatory body, court, central bank or other entity exercising executive, legislative, judicial, taxing, regulatory or administrative powers or functions of or pertaining to government.

“Governmental Requirement” means any law, statute, code, ordinance, order, determination, rule, regulation, judgment, decree, injunction, franchise, permit, certificate, license, authorization or other directive or requirement, whether now or hereinafter in effect, of any Governmental Authority.

“Guarantee” has the meaning set forth in the definition of “Investment”.

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“Guarantors” means

(a) CLLR, Inc., a Delaware corporation,

Bandelier Pipeline Holding, LLC, a Delaware limited liability company,

Carrizo Marcellus Holding Inc., a Delaware corporation,

Mescalero Pipeline, LLC, a Delaware limited liability company,

Hondo Pipeline, Inc., a Delaware corporation,

Carrizo (Marcellus) LLC, a Delaware limited liability company, and

Carrizo (Marcellus) WV LLC, a Delaware limited liability company, and

(b) each Material Domestic Subsidiary that guarantees after the Effective Date the Obligations pursuant to Section 8.13.

“Guaranty Agreement” means an agreement executed by the Guarantors in substantially the form of Exhibit F-2 unconditionally guarantying, on a joint and several basis, payment of the Obligations.

“Hazardous Material” means any substance regulated or as to which liability might arise under any applicable Environmental Law including: (a) any chemical, compound, material, product, byproduct, substance or waste defined as or included in the definition or meaning of “hazardous substance,” “hazardous material,” “hazardous waste,” “solid waste,” “toxic waste,” “extremely hazardous substance,” “toxic substance,” “contaminant,” “pollutant,” or words of similar meaning or import found in any applicable Environmental Law; (b) Hydrocarbons, petroleum products, petroleum substances, natural gas, oil, oil and gas waste, crude oil, and any components, fractions, or derivatives thereof; and (c) radioactive materials, explosives, asbestos or asbestos containing materials, polychlorinated biphenyls, radon, infectious or medical wastes.

“Hedge Agreement” means any agreement with respect to any swap, forward, future or derivative transaction or option or similar agreement, whether exchange traded, “over-the-counter” or otherwise, involving, or settled by reference to, one or more rates, currencies, commodities, equity or debt instruments or securities, or economic, financial or pricing indices or measures of economic, financial or pricing risk or value or any similar transaction or any combination of these transactions.

“Hedge Bank” means any Person that is party to a Hedge Agreement with the Borrower or any Restricted Subsidiary if either (i) at the time such Hedge Agreement was entered into, such Person was a Lender or Affiliate of a Lender hereunder or (ii) such Hedge Agreement was in effect on the Effective Date and such Person or an Affiliate of such Person was a Lender on the Effective Date.

“Hedge Position Cancellation Event” means any assignment, termination, sale or unwinding of any hedge position under any Hedge Agreement upon which the Lenders relied in

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determining the then-effective Borrowing Base, or the creation of any off-setting position (whether evidenced by a floor, put or Hedge Agreement) with respect to any hedge position under any Hedge Agreement upon which the Lenders relied in determining the then-effective Borrowing Base, in each case if (a) the effect of such action, after taking into account the net hedging position under all then outstanding Hedge Agreements of the Borrower and the Restricted Subsidiaries taken as a whole (including any other Hedge Agreements executed contemporaneously with the taking of such action), would be to cancel any of the Borrower’s or any of the Restricted Subsidiaries’ positions under all such Hedging Agreements and (b) to the extent the value attributed to such cancelled positions for purposes of determining the then-effective Borrowing Base were excluded from the Borrowing Base at such time, the Borrowing Base would reasonably be expected to be reduced by an amount in excess of 3% thereof.

“Hedge Termination Value” means, in respect of any one or more Hedge Agreements, after taking into account the effect of any legally enforceable netting agreement relating to such Hedge Agreements, (a) for any date on or after the date such Hedge Agreements have been closed out and termination value(s) determined in accordance therewith, such termination value(s) and (b) for any date prior to the date referenced in clause (a), the amount(s) determined as the xxxx-to-market value(s) for such Hedge Agreements, as determined by the counterparties to such Hedge Agreements.

“Highest Lawful Rate” means, with respect to each Lender, the maximum nonusurious interest rate, if any, that at any time or from time to time may be contracted for, taken, reserved, charged or received on the Notes or on other Obligations under laws applicable to such Lender which are presently in effect or, to the extent allowed by law, under such applicable laws which may hereafter be in effect and which allow a higher maximum nonusurious interest rate than applicable laws allow as of the date hereof.

“Hydrocarbon Interests” means all rights, titles, interests and estates now or hereafter acquired in and to oil and gas leases, oil, gas and mineral leases, or other liquid or gaseous hydrocarbon leases, mineral fee interests, overriding royalty and royalty interests, net profit interests and production payment interests, including any reserved or residual interests of whatever nature.

“Hydrocarbons” means oil, gas, casinghead gas, drip gasoline, natural gasoline, condensate, distillate, liquid hydrocarbons, gaseous hydrocarbons and all products refined or separated therefrom.

“Indemnified Taxes” means Taxes other than Excluded Taxes.

“Indentures” means (a) the Existing Convertible Notes Indenture, (b) the Existing 2018 Notes Indenture and (b) the indentures, supplemental indentures or other agreements under or pursuant to which any Permitted Additional Senior Notes are issued.

“Initial Reserve Report” means the reserve report prepared by the Borrower with respect to certain Oil and Gas Properties of the Borrower and the Restricted Subsidiaries as of October 1, 2010.

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“Interest Election Request” means a request by the Borrower to convert or continue a Borrowing in accordance with Section 2.04.

“Interest Expense” means, for any period, the sum (determined without duplication) of the aggregate interest expense of the Borrower and the Consolidated Subsidiaries for such period paid in cash, including, to the extent included in interest expense under GAAP, (a) the portion of any payments or accruals under Capital Leases allocable to interest expense, plus (b) the portion of any payments or accruals under Synthetic Leases allocable to interest expense, whether or not the same constitutes interest expense under GAAP.

“Interest Payment Date” means (a) with respect to any ABR Loan, the last day of each March, June, September and December and (b) with respect to any Eurodollar Loan, the last day of the Interest Period applicable to the Borrowing of which such Loan is a part and, in the case of a Eurodollar Borrowing with an Interest Period of more than three months’ duration, each day prior to the last day of such Interest Period that occurs at intervals of three months’ duration after the first day of such Interest Period.

“Interest Period” means, with respect to any Eurodollar Borrowing, the period commencing on the date of such Borrowing and ending on the numerically corresponding day in the calendar month that is one, two, three or six months (or, with the consent of each Lender, nine or twelve months) thereafter, as the Borrower may elect; provided, that (a) if any Interest Period would end on a day other than a Business Day, such Interest Period shall be extended to the next succeeding Business Day unless such next succeeding Business Day would fall in the next calendar month, in which case such Interest Period shall end on the next preceding Business Day and (b) any Interest Period pertaining to a Eurodollar Borrowing that commences on the last Business Day of a calendar month (or on a day for which there is no numerically corresponding day in the last calendar month of such Interest Period) shall end on the last Business Day of the last calendar month of such Interest Period. For purposes hereof, the date of a Borrowing initially shall be the date on which such Borrowing is made and thereafter shall be the effective date of the most recent conversion or continuation of such Borrowing.

“Interim Redetermination” has the meaning assigned such term in Section 2.07(b).

“Interim Redetermination Date” means the date on which a Borrowing Base that has been redetermined pursuant to an Interim Redetermination becomes effective as provided in Section 2.07(d).

“Investment” means, as applied to any Person: (a) the acquisition (whether for cash, Property, services or securities or otherwise) of Equity Interests in any other Person; (b) the making of any loan or capital contribution to, assumption of Debt of, or purchase or other acquisition of any other Debt or equity participation or interest in any other Person (including the purchase of Property from another Person subject to an understanding or agreement, contingent or otherwise, to resell such Property to such Person, but excluding any such advance, loan or extension of credit having a term not exceeding ninety (90) days representing the purchase price of inventory or supplies sold by such Person in the ordinary course of business); or (c) the entering into of any guarantee of, or other contingent obligation pursuant to which such Person assures a creditor against loss with respect to, Debt of any other Person (a “Guarantee”);

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provided that, (i) with respect to the UK Cost Overrun Guarantee, only amounts actually demanded in good faith by or paid to the Person to whom such Debt is owed shall be considered an “Investment” and (ii) with respect to any Guarantee other than the UK Cost Overrun Guarantee, the amount of the Investment represented by such Guarantee shall be the lesser of the amount of the Debt that is the subject of such Guarantee and the maximum stated amount of such Guarantee.

“Issuing Bank” means BNP, in its capacity as the issuer of Letters of Credit hereunder. The Issuing Bank may, in its discretion, arrange for one or more Letters of Credit to be issued by Affiliates of the Issuing Bank, in which case the term “Issuing Bank” shall include any such Affiliate with respect to Letters of Credit issued by such Affiliate.

“LC Commitment” at any time means Fifteen Million dollars ($15,000,000) or, if less, the Aggregate Maximum Credit Amounts.

“LC Disbursement” means a payment made by the Issuing Bank pursuant to a Letter of Credit.

“LC Exposure” means, at any time, the sum of (a) the aggregate undrawn amount of all outstanding Letters of Credit at such time plus (b) the aggregate amount of all LC Disbursements that have not yet been reimbursed by or on behalf of the Borrower at such time. The LC Exposure of any Lender at any time shall be its Applicable Percentage of the total LC Exposure at such time.

“Lenders” means the Persons listed on Annex I and any Person that shall have become a party hereto pursuant to an Assignment and Assumption, other than any such Person that ceases to be a party hereto pursuant to an Assignment and Assumption.

“Letter of Credit” means any letter of credit issued pursuant to this Agreement.

“Letter of Credit Agreements” means all letter of credit applications and other agreements (including any amendments, modifications or supplements thereto) submitted by the Borrower, or entered into by the Borrower, with the Issuing Bank relating to any Letter of Credit.

“LIBO Rate” means, with respect to any Eurodollar Borrowing for any Interest Period, the rate (rounded upwards, if necessary, to the next 1/100 of 1%) appearing on Reuters Screen LIBOR01 Page (or on any successor or substitute page of such service, or any successor to or substitute for such service, providing rate quotations comparable to those currently provided on such page of such service, as determined by the Administrative Agent from time to time for purposes of providing quotations of interest rates applicable to dollar deposits in the London interbank market) at approximately 11:00 a.m., London time, two Business Days prior to the commencement of such Interest Period, as the rate for dollar deposits with a maturity comparable to such Interest Period. In the event that such rate is not available at such time for any reason, then the “LIBO Rate” with respect to such Eurodollar Borrowing for such Interest Period shall be the rate (rounded upwards, if necessary, to the next 1/100 of 1%) at which dollar deposits of an amount comparable to such Eurodollar Borrowing and for a maturity comparable to such Interest Period are offered by the principal London office of the Administrative Agent in

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immediately available funds in the London interbank market at approximately 11:00 a.m., London time, two Business Days prior to the commencement of such Interest Period.

“Lien” means any interest in Property securing an obligation owed to, or a claim by, a Person other than the owner of the Property, whether such interest is based on the common law, statute or contract, and whether such obligation or claim is fixed or contingent, and including but not limited to (a) the lien or security interest arising from a mortgage, encumbrance, pledge, security agreement, conditional sale or trust receipt or a financing lease, consignment or bailment for security purposes or (b) production payments and the like payable out of Oil and Gas Properties. The term “Lien” shall include easements, restrictions, servitudes, permits, conditions, covenants, exceptions or reservations. For the purposes of this Agreement, the Borrower and the Credit Parties shall be deemed to be the owner of any Property which it has acquired or holds subject to a conditional sale agreement or leases under a financing lease pursuant to which title to the Property has been retained by or vested in some other Person in a transaction intended to create a financing.

“Loan Documents” means this Agreement, the Notes, if any, the Letter of Credit Agreements, the Letters of Credit and the Security Instruments.

“Loans” means the loans made by the Lenders to the Borrower pursuant to this Agreement.

“Majority Lenders” means, at any time while no Loans or LC Exposure are outstanding, Lenders having more than fifty percent (50.0%) of the Aggregate Maximum Credit Amounts; and at any time while any Loans or LC Exposure are outstanding, Lenders holding more than fifty percent (50.0%) of the outstanding aggregate principal amount of the Loans and participation interests in Letters of Credit (without regard to any sale by a Lender of a participation in any Loan under Section 12.04(c)); provided that the Maximum Credit Amount and the outstanding principal amount of the Loans of, and the participation interests in Letters of Credit held by, each Defaulting Lender (if any) shall be excluded from the determination of Majority Lenders to the extent set forth in Section 4.03(c)(ii).

“Material Adverse Effect” means a material adverse change in, or material adverse effect on (a) the business, operations, Property or financial condition of the Borrower and the Restricted Subsidiaries, taken as a whole, (b) the ability of the Borrower and the Guarantors, taken as a whole, to perform their obligations under the Loan Documents, (c) the validity or enforceability of any Loan Document or (d) the rights and remedies of the Administrative Agent, the Issuing Bank or the Lenders under the Loan Documents.

“Material Domestic Subsidiary” means, as of any date, any Domestic Subsidiary that (a) is a Wholly-Owned Subsidiary and (b) together with its Subsidiaries, (i) owns Property which represents more than 1% of the consolidated assets of the Borrower and the Consolidated Subsidiaries as of the last day of the most recently ended fiscal quarter of the Borrower for which financial statements have been delivered pursuant to Section 8.01(a) or 8.01(b), or (ii) is responsible for more than 1% of the consolidated revenues of the Borrower and the Consolidated Subsidiaries for the most recently ended period of four consecutive fiscal quarters of the Borrower for which financial statements have been delivered pursuant to Section 8.01(a) or

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8.01(b), but excluding (i) the value of the Equity Interests such Domestic Subsidiary owns in any other Domestic Subsidiaries and (ii) intercompany debt owed to such Domestic Subsidiary from any other Domestic Subsidiary or the Borrower.

“Material Indebtednesss” means Debt (other than the Loans and Letters of Credit), or obligations in respect of one or more Hedge Agreements, of any one or more Credit Parties in an aggregate principal amount exceeding $10,000,000. For purposes of determining Material Indebtednesss, the “principal amount” of the obligations of the Borrower or any other Credit Party in respect of any Hedge Agreement at any time shall be the Hedge Termination Value thereof.

“Maturity Date” means January 27, 2016.

“Maximum Credit Amount” means, as to each Lender, the amount set forth opposite such Lender’s name on Annex I under the caption “Maximum Credit Amount”, as such amount may be, as the same may be (a) reduced or terminated from time to time in connection with a reduction or termination of the Aggregate Maximum Credit Amounts pursuant to Section 2.06(b) or (b) modified from time to time pursuant to any assignment permitted by Section 12.04(b).

“Moody’s” means Xxxxx’x Investors Service, Inc. and any successor thereto that is a nationally recognized rating agency.

“Mortgaged Property” means any Property owned by the Borrower or any Guarantor which is subject to the Liens created under the terms of the Security Instruments.

“New Borrowing Base Notice” has the meaning assigned such term in Section 2.07(d).

“Non-Defaulting Lender” means, at any time, each Lender that is not a Defaulting Lender at such time.

“Non-Recourse Debt” means any Debt of any Unrestricted Subsidiary, in each case in respect of which: (a) the holder or holders thereof (i) shall, except as provided in the immediately succeeding clause (ii), have recourse only to, and shall have the right to require the obligations of such Unrestricted Subsidiary to be performed, satisfied, and paid only out of, the Property of such Unrestricted Subsidiary and/or one or more of its Subsidiaries and the Equity Interests in such Unrestricted Subsidiary and (ii) except for the UK Cost Overrun Guarantee and other Guarantees permitted under Section 9.05(o), shall have no direct or indirect recourse (including by way of guaranty, support or indemnity) to the Borrower or any of the Restricted Subsidiaries or to any Property of the Borrower or any of the Restricted Subsidiaries, whether for principal, interest, fees, expenses or otherwise; and (b) the terms and conditions relating to the non-recourse nature of such Debt are in form and substance reasonably acceptable to the Administrative Agent (it being understood that such terms and conditions with respect to the Carrizo UK Facility are acceptable to the Administrative Agent).

“North Sea Properties” means the UK Petroleum Production Licence No. P1114 governing Blocks 22/14b and 22/19b, together with any other licences unitized therewith and all associated property, plant and equipment located on, or related to such licenses.

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“Notes” means the promissory notes of the Borrower described in Section 2.02(d) and being substantially in the form of Exhibit A, together with all amendments, modifications, replacements, extensions and rearrangements thereof.

“Obligations” means any and all amounts owing by the Borrower or any of the Restricted Subsidiaries (whether direct or indirect (including those acquired by assumption), absolute or contingent, due or to become due, now existing or hereafter arising): (a) to the Administrative Agent, the Issuing Bank or any Lender under any Loan Document; (b) to any Hedge Bank under any Hedge Agreement between the Borrower or any Restricted Subsidiary and such Hedge Bank, in each case, after giving effect to all netting arrangements relating to such Hedge Agreement; (c) obligations under all Treasury Management Agreements with any Lender or any Affiliate of a Lender; and (d) all renewals, extensions and/or rearrangements of any of the above.

“Oil and Gas Properties” means (a) Hydrocarbon Interests; (b) the Properties now or hereafter pooled or unitized with Hydrocarbon Interests; (c) all presently existing or future unitization, pooling agreements and declarations of pooled units and the units created thereby (including without limitation all units created under orders, regulations and rules of any Governmental Authority) which may affect all or any portion of the Hydrocarbon Interests; (d) all operating agreements, contracts and other agreements, including production sharing contracts and agreements, which relate to any of the Hydrocarbon Interests or the production, sale, purchase, exchange or processing of Hydrocarbons from or attributable to such Hydrocarbon Interests; (e) all Hydrocarbons in and under and which may be produced and saved or attributable to the Hydrocarbon Interests, including all oil in tanks, and all rents, issues, profits, proceeds, products, revenues and other incomes from or attributable to the Hydrocarbon Interests; (f) all tenements, hereditaments, appurtenances and Properties in any manner appertaining, belonging, affixed or incidental to the Hydrocarbon Interests and (g) all Properties, rights, titles, interests and estates described or referred to above, including any and all Property, real or personal, now owned or hereafter acquired and situated upon, used, held for use or useful in connection with the operating, working or development of any of such Hydrocarbon Interests or Property (excluding drilling rigs, automotive equipment, rental equipment or other personal Property which may be on such premises for the purpose of drilling a well or for other similar temporary uses) and including any and all oil xxxxx, gas xxxxx, injection xxxxx or other xxxxx, buildings, structures, fuel separators, liquid extraction plants, plant compressors, pumps, pumping units, field gathering systems, tanks and tank batteries, fixtures, valves, fittings, machinery and parts, engines, boilers, meters, apparatus, equipment, appliances, tools, implements, cables, wires, towers, casing, tubing and rods, surface leases, rights-of-way, easements and servitudes together with all additions, substitutions, replacements, accessions and attachments to any and all of the foregoing.

“Organizational Documents” means, with respect to any Person, (a) in the case of any corporation, the certificate of incorporation and by-laws (or similar documents) of such Person, (b) in the case of any limited liability company, the certificate of formation and limited liability company agreement (or similar documents) of such Person, (c) in the case of any limited partnership, the certificate of formation and limited partnership agreement (or similar documents) of such Person, (d) in the case of any general partnership, the partnership agreement (or similar document) of such Person and (e) in any other case, the functional equivalent of the foregoing.

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“Other Taxes” means any and all present or future stamp or documentary taxes or any other excise or Property taxes, charges or similar levies arising from any payment made hereunder or from the execution, delivery or enforcement of, or otherwise with respect to, this Agreement and any other Loan Document other than Excluded Taxes.

“Participant” has the meaning set forth in Section 12.04(c)(i).

“Permitted Additional Senior Notes” means any unsecured senior, senior subordinated or convertible notes issued after the Effective Date by the Borrower under Section 9.02(f).

“Permitted Refinancing Debt” means Debt (for purposes of this definition, “new Debt”) incurred in exchange for (other than pursuant to an Exchange Offer), or proceeds of which are used to extend, refinance, renew, replace, defease, discharge, refund or otherwise retire for value, in whole or in part, any other Debt (the “Refinanced Debt”); provided that (a) such new Debt is in an aggregate principal amount not in excess of the sum of (i) the aggregate principal amount then outstanding of the Refinanced Debt (or, if the Refinanced Debt is exchanged or acquired for an amount less than the principal amount thereof to be due and payable upon a declaration of acceleration thereof, such lesser amount) and (ii) an amount necessary to pay all accrued (including, for the purposes of defeasance, future accrued) and unpaid interest on the Refinanced Debt and any fees and expenses, including premiums, related to such exchange or refinancing; (b) such new Debt has a stated maturity no earlier than the sooner to occur of (i) the date that is 91 days after the Maturity Date (as in effect on the date of incurrence of such new Debt) and (ii) the stated maturity date of the Refinanced Debt; (c) such new Debt has an average life at the time such new Debt is incurred that is no shorter than the shorter of (i) the period beginning on the date of incurrence of such new Debt and ending on the date that is 91 days after the Maturity Date (as in effect on the date of incurrence of such new Debt) and (ii) the average life of the Refinanced Debt at the time such new Debt is incurred; (d) the covenants of such new Debt, when taken as a whole, are not materially more onerous to the Borrower and the Credit Parties than those imposed by the Refinanced Debt, as determined in good faith by a Financial Officer; (e) such new Debt is not incurred or guaranteed by a non-Guarantor Restricted Subsidiary if the Borrower or a Guarantor is the issuer or is otherwise an obligor on the Refinanced Debt; and (f) if the Refinanced Debt was subordinated in right of payment to the Obligations or the guarantees under the Guaranty Agreement, such new Debt (and any guarantees thereof) is subordinated in right of payment to the Obligations (or, if applicable, the guarantees under the Guaranty Agreement) to at least the same extent as the Refinanced Debt.

“Person” means any natural person, corporation, limited liability company, trust, joint venture, association, company, partnership, Governmental Authority or other entity.

“Plan” means any employee pension benefit plan, as defined in section 3(2) of ERISA, which (a) is currently or hereafter sponsored, maintained or contributed to by the Borrower, a Subsidiary or an ERISA Affiliate or (b) was at any time during the six calendar years preceding the date hereof, sponsored, maintained or contributed to by the Borrower or any other Credit Party or an ERISA Affiliate.

“Prime Rate” means the rate of interest per annum publicly announced from time to time by the Administrative Agent as its prime rate in effect at its principal office in Houston; each

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change in the Prime Rate shall be effective from and including the date such change is publicly announced as being effective. Such rate is set by the Administrative Agent as a general reference rate of interest, taking into account such factors as the Administrative Agent may deem appropriate; it being understood that many of the Administrative Agent’s commercial or other loans are priced in relation to such rate, that it is not necessarily the lowest or best rate actually charged to any customer and that the Administrative Agent may make various commercial or other loans at rates of interest having no relationship to such rate.

“Property” means any interest in any kind of property or asset, whether real, personal or mixed, or tangible or intangible, including, without limitation, cash, securities, accounts and contract rights.

“Proposed Borrowing Base” has the meaning assigned to such term in Section 2.07(c)(i).

“Proposed Borrowing Base Notice” has the meaning assigned to such term in Section 2.07(c)(ii).

“Redemption” means with respect to any Debt, the repurchase, redemption, prepayment, repayment, defeasance or any other acquisition or retirement for value (or the segregation of funds with respect to any of the foregoing) of such Debt. “Redeem” has the correlative meaning thereto.

“Redetermination Date” means, with respect to any Scheduled Redetermination or any Interim Redetermination, the date that the redetermined Borrowing Base related thereto becomes effective pursuant to Section 2.07(d).

“Refinanced Debt” has the meaning assigned such term in the definition of “Permitted Refinancing Debt”.

“Register” has the meaning assigned such term in Section 12.04(b)(iv).

“Regulation D” means Regulation D of the Board, as the same may be amended, supplemented or replaced from time to time.

“Related Parties” means, with respect to any specified Person, such Person’s Affiliates and the respective directors, officers, employees, agents and advisors (including attorneys, accountants and experts) of such Person and such Person’s Affiliates.

“Release” means any depositing, spilling, leaking, pumping, pouring, placing, emitting, discarding, abandoning, emptying, discharging, migrating, injecting, escaping, leaching, dumping, or disposing.

“Remedial Work” has the meaning assigned such term in Section 8.09(a).

“Required Lenders” means, at any time while no Loans or LC Exposure are outstanding, Lenders having at least sixty six and two-thirds percent (66-2/3%) of the Aggregate Maximum Credit Amounts; and at any time while any Loans or LC Exposure are outstanding, Lenders holding at least sixty six and two-thirds percent (66-2/3%) of the outstanding aggregate principal

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amount of the Loans or participation interests in such Letters of Credit (without regard to any sale by a Lender of a participation in any Loan under Section 12.04(c)); provided that the Maximum Credit Amount and the outstanding principal amount of the Loans of, and the participation interests in Letters of Credit held by, each Defaulting Lender (if any) shall be excluded from the determination of Required Lenders to the extent set forth in Section 4.03(c)(ii).

“Reserve Report” means a report, in form and substance reasonably satisfactory to the Administrative Agent, setting forth, as of each January 1st or July 1st (or such other date in the event of an Interim Redetermination), the oil and gas reserves attributable to the Oil and Gas Properties of the Borrower and the Credit Parties, together with a projection of the rate of production and future net income, taxes, operating expenses and capital expenditures with respect thereto as of such date, based upon the economic assumptions consistent with the Administrative Agent’s lending requirements at the time.

“Reserve Report Certificate” means a certificate of a Responsible Officer in substantially the form of Exhibit H attached hereto certifying as to the matters set forth in Section 8.11(c).

“Responsible Officer” means, as to any Person, the Chief Executive Officer, the President, any Financial Officer or any Vice President of such Person. Unless otherwise specified, all references to a Responsible Officer herein shall mean a Responsible Officer of the Borrower.

“Restricted Payment” means any dividend or other distribution (whether in cash, securities or other Property) with respect to any Equity Interests in the Borrower or any of the Restricted Subsidiaries, or any payment (whether in cash, securities or other Property), including any sinking fund or similar deposit, on account of the purchase, redemption, retirement, acquisition, cancellation or termination of any such Equity Interests in the Borrower or any of the Restricted Subsidiaries.

“Restricted Subsidiary” means any Subsidiary of the Borrower that is not an Unrestricted Subsidiary.

“Revolving Credit Exposure” means, with respect to any Lender at any time, the sum of the outstanding principal amount of such Lender’s Loans and its LC Exposure at such time.

“Sale” has the meaning set forth in Section 9.11.

“Scheduled Redetermination” has the meaning assigned such term in Section 2.07(b).

“Scheduled Redetermination Date” means the date on which a Borrowing Base that has been redetermined pursuant to a Scheduled Redetermination becomes effective as provided in Section 2.07(d).

“SEC” means the Securities and Exchange Commission or any successor Governmental Authority.

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“Security Instruments” means the Guaranty Agreement, the mortgages, deeds of trust and other agreements, instruments or certificates described or identified in Exhibit F-1, and any and all other agreements or instruments, now or hereafter executed and delivered by the Borrower or any Guarantor (other than Hedge Agreements and Treasury Management Agreements) as security for the payment or performance of the Obligations.

“Senior Debt” means, at any date, all Total Debt other than the Senior Notes.

“Senior Notes” means the Existing Senior Notes, any Permitted Additional Senior Notes and any Permitted Refinancing Debt in respect thereof.

“S&P” means Standard & Poor’s Ratings Group, a division of The XxXxxx-Xxxx Companies, Inc., and any successor thereto that is a nationally recognized rating agency.

“Statutory Reserve Rate” means a fraction (expressed as a decimal), the numerator of which is the number one and the denominator of which is the number one minus the aggregate of the maximum reserve percentages (including any marginal, special, emergency or supplemental reserves) expressed as a decimal established by the Board to which the Administrative Agent is subject with respect to the Adjusted LIBO Rate, for eurocurrency funding (currently referred to as “Eurocurrency Liabilities” in Regulation D of the Board). Such reserve percentages shall include those imposed pursuant to such Regulation D. Eurodollar Loans shall be deemed to constitute eurocurrency funding and to be subject to such reserve requirements without benefit of or credit for proration, exemptions or offsets that may be available from time to time to any Lender under such Regulation D or any comparable regulation. The Statutory Reserve Rate shall be adjusted automatically on and as of the effective date of any change in any reserve percentage.

“subsidiary” of a Person means (a) a corporation, partnership, joint venture, limited liability company or other business entity of which Equity Interests representing more than 50% of the ordinary voting power to elect a majority of the board of directors, managers or other governing body (irrespective of whether or not at the time Equity Interests of any other class or classes of such Person shall have or might have voting power by reason of the happening of any contingency) are at the time owned or controlled by such Person or one or more of its subsidiaries or by such Person and one or more of its subsidiaries, and (b) any partnership of which such Person or any of its subsidiaries is a general partner.

“Subsidiary” means any subsidiary of the Borrower.

“Synthetic Leases” means, in respect of any Person, all leases which shall have been, or should have been, in accordance with GAAP, treated as operating leases on the financial statements of the Person liable (whether contingently or otherwise) for the payment of rent thereunder and which were properly treated as indebtedness for borrowed money for purposes of U.S. federal income taxes, if the lessee in respect thereof is obligated to either purchase for an amount in excess of, or pay upon early termination an amount in excess of, 80% of the residual value of the Property subject to such operating lease upon expiration or early termination of such lease.

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“Taxes” means any and all present or future taxes, levies, imposts, duties, deductions, charges or withholdings imposed by any Governmental Authority.

“Termination Date” means the earlier of the Maturity Date and the date of termination of the Commitments.

“Title Policies and Procedures” means the “Carrizo Title Examination in Xxxxxxx Shale Urban Areas Policies and Procedures; Work Product and Expected Results”, amended and revised as of November 18, 2009, a copy of which was delivered to the Administrative Agent prior to the Effective Date, as amended, supplemented, restated or otherwise modified from time to time (but only to the extent any such amendment, supplement, restatement or other modification would not reasonably be expected to be disadvantageous to the Lenders in any material respect).

“Total Debt” means, at any date, an amount equal to (a) all Debt of the Borrower and the Consolidated Subsidiaries, excluding (i) non-cash obligations under or as a result of the application of FAS 133 or otherwise and (ii) the Borrower’s obligations under the UK Cost Overrun Guarantee, less (b) all cash and cash equivalents of the Borrower and the Consolidated Subsidiaries as of such date which is unrestricted and subject to no Liens other than in favor of the Administrative Agent. For purposes of this definition and for determining the Borrower’s compliance with Section 9.01(a), Debt of the Borrower and the Consolidated Subsidiaries shall not include, for each date of determination during the period from January 1, 2011 through December 31, 2011, an amount equal to (i) $6,404,669 (which represents the equity component of the aggregate principal amount of Existing Convertible Notes outstanding on the Effective Date (determined pursuant to FASB Staff Position (“FSB”) Accounting Principles Board (“APB”) 14-1)), multiplied by (ii) a fraction, (x) the numerator of which is equal to the aggregate outstanding principal amount of the Existing Convertible Notes on such date of determination and (y) the denominator of which is equal to $73,750,000.

“Transactions” means, with respect to (a) the Borrower, the execution, delivery and performance by the Borrower of this Agreement and each other Loan Document to which it is a party, the borrowing of Loans, the use of the proceeds thereof and the issuance of Letters of Credit hereunder, and the grant of Liens by the Borrower on Mortgaged Properties and other Properties pursuant to the Security Instruments and (b) each Guarantor, the execution, delivery and performance by such Guarantor of each Loan Document to which it is a party, the guaranteeing of the Obligations under the Guaranty Agreement by such Guarantor and the grant of Liens by such Guarantor on Mortgaged Properties and other Properties pursuant to the Security Instruments.

“Treasury Management Agreements” means any agreements regarding bank services provided to the Borrower or any Restricted Subsidiary for commercial credit cards and treasury management services, including, without limitation, controlled disbursement, automated clearinghouse transactions, return items, overdrafts and interstate depository network services.

“Type”, when used in reference to any Loan or Borrowing, refers to whether the rate of interest on such Loan, or on the Loans comprising such Borrowing, is determined by reference to the Alternate Base Rate or the Adjusted LIBO Rate.

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“UK Cost Overrun Guarantee” means the Borrower’s obligations under the Carrizo UK Facility.

“Unrestricted Subsidiary” means Carrizo UK Huntington and any other Subsidiary designated as such on Schedule 7.14 or which the Borrower has designated in writing to the Administrative Agent to be an Unrestricted Subsidiary pursuant to Section 9.16.

“Wholly-Owned Subsidiary” means any Subsidiary of which all of the outstanding Equity Interests (other than any directors’ qualifying shares mandated by applicable law), on a fully-diluted basis, are owned by the Borrower or one or more other Wholly-Owned Subsidiaries or are owned by the Borrower and one or more other Wholly-Owned Subsidiaries.

Section 1.03 Types of Loans and Borrowings. For purposes of this Agreement, Loans and Borrowings may be classified and referred to by Type (e.g., a “Eurodollar Loan” or a “Eurodollar Borrowing”).

Section 1.04 Terms Generally; Rules of Construction. The definitions of terms herein shall apply equally to the singular and plural forms of the terms defined. Whenever the context may require, any pronoun shall include the corresponding masculine, feminine and neuter forms. The words “include”, “includes” and “including” as used in this Credit Agreement shall be deemed to be followed by the phrase “without limitation”. The word “will” shall be construed to have the same meaning and effect as the word “shall”. Unless the context requires otherwise, (a) any definition of or reference to any agreement, instrument or other document herein shall be construed as referring to such agreement, instrument or other document as from time to time amended, supplemented or otherwise modified (subject to any restrictions on such amendments, supplements or modifications set forth in the Loan Documents), (b) any reference herein to any law shall be construed as referring to such law as amended, modified, codified or reenacted, in whole or in part, and in effect from time to time, (c) any reference herein to any Person shall be construed to include such Person’s successors and assigns (subject to the restrictions contained in the Loan Documents), (d) the words “herein”, “hereof” and “hereunder”, and words of similar import, shall be construed to refer to this Agreement in its entirety and not to any particular provision hereof, (e) with respect to the determination of any time period, the word “from” means “from and including” and the word “to” means “to and including” and (f) any reference herein to Articles, Sections, Annexes, Exhibits and Schedules shall be construed to refer to Articles and Sections of, and Annexes, Exhibits and Schedules to, this Agreement. No provision of this Agreement or any other Loan Document shall be interpreted or construed against any Person solely because such Person or its legal representative drafted such provision.

Section 1.05 Accounting Terms and Determinations; GAAP. Unless otherwise specified herein, all accounting terms used herein shall be interpreted, all determinations with respect to accounting matters hereunder shall be made, and all financial statements and certificates and reports as to financial matters required to be furnished to the Administrative Agent or the Lenders hereunder shall be prepared, in accordance with GAAP, applied on a basis consistent with the Financial Statements except for changes in which Borrower’s independent certified public accountants concur and which are disclosed therein (provided that, unless the Borrower and the Majority Lenders shall otherwise agree in writing, no such change shall modify or affect the manner in which compliance with the covenants contained herein is

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computed, such that all such computations shall be conducted utilizing financial information presented consistently with prior periods); and provided further that, if the Borrower notifies the Administrative Agent that the Borrower wishes to amend any covenant in Article IX or any financial ratio or requirement set forth in any Loan Document or any definition used therein to eliminate the effect of any change in GAAP on the operation of such covenant, financial ratio or requirement or definition (or if the Administrative Agent notifies the Borrower that the Required Lenders wish to amend Article IX or any other Loan Document for such purpose), then the Borrower’s compliance with such covenant, financial ratio or requirement shall be determined on the basis of GAAP in effect immediately before the relevant change in GAAP became effective, until either such notice is withdrawn or such covenant, financial ratio or requirement or definition is amended in a manner satisfactory to the Borrower and the Majority Lenders. Notwithstanding anything to the contrary in this Agreement or any other Loan Document, for purposes of calculations made pursuant to the terms of this Agreement or any other Loan Document, GAAP will be deemed to treat leases that would have been classified as operating leases in accordance with generally accepted accounting principles in the United States of America as in effect on December 31, 2009 in a manner consistent with the treatment of such leases under generally accepted accounting principles in the United States of America as in effect on December 31, 2009, notwithstanding any modifications or interpretive changes thereto that may occur thereafter.

ARTICLE II

The Credits

Section 2.01 Commitments. Subject to the terms and conditions set forth herein, each Lender agrees to make Loans to the Borrower during the Availability Period in an aggregate principal amount that will not result in (a) such Lender’s Revolving Credit Exposure exceeding such Lender’s Commitment or (b) the total Revolving Credit Exposures exceeding the total Commitments. Within the foregoing limits and subject to the terms and conditions set forth herein, the Borrower may borrow, repay and reborrow the Loans.

Section 2.02 Loans and Borrowings.

(a) Borrowings; Several Obligations. Each Loan shall be made as part of a Borrowing consisting of Loans made by the Lenders ratably in accordance with their respective Commitments. The failure of any Lender to make any Loan required to be made by it shall not relieve any other Lender of its obligations hereunder; provided that the Commitments are several and no Lender shall be responsible for any other Lender’s failure to make Loans as required.

(b) Types of Loans. Subject to Section 3.03, each Borrowing shall be comprised entirely of ABR Loans or Eurodollar Loans as the Borrower may request in accordance herewith. Each Lender at its option may make any Eurodollar Loan by causing any domestic or foreign branch or Affiliate of such Lender to make such Loan; provided that any exercise of such option shall not affect the obligation of the Borrower to repay such Loan in accordance with the terms of this Agreement.

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(c) Minimum Amounts; Limitation on Number of Borrowings. At the commencement of each Interest Period for any Eurodollar Borrowing, such Borrowing shall be in an aggregate amount that is an integral multiple of $1,000,000 and not less than $5,000,000. At the time that each ABR Borrowing is made, such Borrowing shall be in an aggregate amount that is an integral multiple of $500,000 and not less than $1,000,000; provided that an ABR Borrowing may be in a lesser aggregate amount that is equal to the entire unused balance of the total Commitments or that is required to finance the reimbursement of an LC Disbursement as contemplated by Section 2.08(e). Borrowings of more than one Type may be outstanding at the same time, provided that there shall not at any time be more than a total of eight (8) Eurodollar Borrowings outstanding. Notwithstanding any other provision of this Agreement, the Borrower shall not be entitled to request, or to elect to convert or continue, any Borrowing if the Interest Period requested with respect thereto would end after the Maturity Date.

(d) Notes. If requested in writing by a Lender, the Loans made by such Lender shall be evidenced by a single promissory note of the Borrower in substantially the form of Exhibit A, dated, in the case of (i) any Lender party hereto as of the date of this Agreement, as of the date of this Agreement or (ii) any Lender that becomes a party hereto pursuant to an Assignment and Assumption, as of the effective date of the Assignment and Assumption, payable to the Lender in a principal amount equal to its Maximum Credit Amount as in effect on such date, and otherwise duly completed. In the event that the Maximum Credit Amount of any Lender whose Loans are evidenced by a Note increases or decreases for any reason (whether pursuant to Section 2.06, Section 12.04(b) or otherwise), upon the prior written request of such Lender, the Borrower shall deliver or cause to be delivered on the effective date of such increase or decrease, a new Note payable to the Lender in a principal amount equal to its Maximum Credit Amount after giving effect to such increase or decrease, and otherwise duly completed. The date, amount, Type, interest rate and, if applicable, Interest Period of each Loan made by each Lender whose Loans are evidenced by a Note, and all payments made on account of the principal thereof, shall be recorded by such Lender on its books for its Note, and, prior to any transfer, may be endorsed by such Lender on a schedule attached to such Note or any continuation thereof or on any separate record maintained by such Lender. Failure to make any such notation or to attach a schedule shall not affect any Lender’s or the Borrower’s rights or obligations in respect of such Loans or affect the validity of such transfer by any Lender of its Note.

Section 2.03 Requests for Borrowings. To request a Borrowing, the Borrower shall notify the Administrative Agent of such request by telephone (a) in the case of a Eurodollar Borrowing, not later than 12:00 noon, Houston time, three Business Days before the date of the proposed Borrowing or (b) in the case of an ABR Borrowing, not later than 11:00 a.m., Houston time, on the date of the proposed Borrowing; provided that no such notice shall be required for any deemed request of an ABR Borrowing to finance the reimbursement of an LC Disbursement as provided in Section 2.08(e). Each such Borrowing Request shall be irrevocable and shall be confirmed promptly by hand delivery or telecopy to the Administrative Agent of a written Borrowing Request in substantially the form of Exhibit B and signed by the Borrower. Each such telephonic and written Borrowing Request shall specify the following information in compliance with Section 2.02:

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(i) the aggregate amount of the requested Borrowing;

(ii) the date of such Borrowing, which shall be a Business Day;

(iii) whether such Borrowing is to be an ABR Borrowing or a Eurodollar Borrowing;

(iv) in the case of a Eurodollar Borrowing, the initial Interest Period to be applicable thereto, which shall be a period contemplated by the definition of the term “Interest Period”;

(v) the amount of the then effective Borrowing Base, the current total Revolving Credit Exposures (without regard to the requested Borrowing) and the pro forma total Revolving Credit Exposures (giving effect to the requested Borrowing); and

(vi) the location and number of the Borrower’s account to which funds are to be disbursed, which shall comply with the requirements of Section 2.05.

If no election as to the Type of Borrowing is specified, then the requested Borrowing shall be an ABR Borrowing. If no Interest Period is specified with respect to any requested Eurodollar Borrowing, then the Borrower shall be deemed to have selected an Interest Period of one month’s duration. Each Borrowing Request shall constitute a representation that the amount of the requested Borrowing shall not cause the total Revolving Credit Exposures to exceed the total Commitments (i.e., the lesser of the Aggregate Maximum Credit Amounts and the then effective Borrowing Base).

Promptly following receipt of a Borrowing Request in accordance with this Section 2.03, the Administrative Agent shall advise each Lender of the details thereof and of the amount of such Lender’s Loan to be made as part of the requested Borrowing.

Section 2.04 Interest Elections.

(a) Conversion and Continuance. Each Borrowing initially shall be of the Type specified in the applicable Borrowing Request and, in the case of a Eurodollar Borrowing, shall have an initial Interest Period as specified in such Borrowing Request. Thereafter, the Borrower may elect to convert such Borrowing to a different Type or to continue such Borrowing and, in the case of a Eurodollar Borrowing, may elect Interest Periods therefor, all as provided in this Section 2.04. The Borrower may elect different options with respect to different portions of the affected Borrowing, in which case each such portion shall be allocated ratably among the Lenders holding the Loans comprising such Borrowing, and the Loans comprising each such portion shall be considered a separate Borrowing.

(b) Interest Election Requests. To make an election pursuant to this Section 2.04, the Borrower shall notify the Administrative Agent of such election by telephone by the time that a Borrowing Request would be required under Section 2.03 if the Borrower were requesting a Borrowing of the Type resulting from such election to be made on the effective date of such election. Each such Interest Election Request shall be irrevocable and shall be

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confirmed promptly by hand delivery or telecopy to the Administrative Agent of a written Interest Election Request in substantially the form of Exhibit C and signed by the Borrower.

(c) Information in Interest Election Requests. Each telephonic and written Interest Election Request shall specify the following information in compliance with Section 2.02:

(i) the Borrowing to which such Interest Election Request applies and, if different options are being elected with respect to different portions thereof, the portions thereof to be allocated to each resulting Borrowing (in which case the information to be specified pursuant to Section 2.04(c)(iii) and (iv) shall be specified for each resulting Borrowing);

(ii) the effective date of the election made pursuant to such Interest Election Request, which shall be a Business Day;

(iii) whether the resulting Borrowing is to be an ABR Borrowing or a Eurodollar Borrowing; and

(iv) if the resulting Borrowing is a Eurodollar Borrowing, the Interest Period to be applicable thereto after giving effect to such election, which shall be a period contemplated by the definition of the term “Interest Period”.

If any such Interest Election Request requests a Eurodollar Borrowing but does not specify an Interest Period, then the Borrower shall be deemed to have selected an Interest Period of one month’s duration.

(d) Notice to Lenders by the Administrative Agent. Promptly following receipt of an Interest Election Request, the Administrative Agent shall advise each Lender of the details thereof and of such Lender’s portion of each resulting Borrowing.

(e) Effect of Failure to Deliver Timely Interest Election Request and Events of Default and Borrowing Base Deficiencies on Interest Election. If the Borrower fails to deliver a timely Interest Election Request with respect to a Eurodollar Borrowing prior to the end of the Interest Period applicable thereto, then, unless such Borrowing is repaid as provided herein, at the end of such Interest Period such Borrowing shall be converted to an ABR Borrowing. Notwithstanding any contrary provision hereof, if an Event of Default has occurred and is continuing and the Administrative Agent, at the request of the Majority Lenders, so notifies the Borrower, then, so long as an Event of Default is continuing: (i) no outstanding Borrowing may be converted to or continued as a Eurodollar Borrowing (and any Interest Election Request that requests the conversion of any Borrowing to, or continuation of any Borrowing as, a Eurodollar Borrowing shall be ineffective) and (ii) unless repaid, each Eurodollar Borrowing shall be converted to an ABR Borrowing at the end of the Interest Period applicable thereto.

Section 2.05 Funding of Borrowings.

(a) Funding by Lenders. Each Lender shall make each Loan to be made by it hereunder on the proposed date thereof by wire transfer of immediately available funds by 2:00

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p.m., Houston time, to the account of the Administrative Agent most recently designated by it for such purpose by notice to the Lenders. The Administrative Agent will make such Loans available to the Borrower by promptly crediting the amounts so received, in like funds, to an account of the Borrower designated by the Borrower in the applicable Borrowing Request; provided that ABR Loans made to finance the reimbursement of an LC Disbursement as provided in Section 2.08(e) shall be remitted by the Administrative Agent to the Issuing Bank. Nothing herein shall be deemed to obligate any Lender to obtain the funds for its Loan in any particular place or manner or to constitute a representation by any Lender that it has obtained or will obtain the funds for its Loan in any particular place or manner.

(b) Presumption of Funding by the Lenders. Unless the Administrative Agent shall have received notice from a Lender prior to the proposed date of any Borrowing that such Lender will not make available to the Administrative Agent such Lender’s share of such Borrowing, the Administrative Agent may assume that such Lender has made such share available on such date in accordance with Section 2.05(a) and may, in reliance upon such assumption, make available to the Borrower a corresponding amount. In such event, if a Lender has not in fact made its share of the applicable Borrowing available to the Administrative Agent, then the applicable Lender and the Borrower severally agree to pay to the Administrative Agent forthwith on demand such corresponding amount with interest thereon, for each day from and including the date such amount is made available to the Borrower to but excluding the date of payment to the Administrative Agent, at (i) in the case of such Lender, the greater of the Federal Funds Effective Rate and a rate determined by the Administrative Agent in accordance with banking industry rules on interbank compensation or (ii) in the case of the Borrower, the interest rate applicable to the Type of such Borrowing. If the Borrower and such Lender shall pay such interest to the Administrative Agent for the same or an overlapping period, the Administrative Agent shall promptly remit to the Borrower the amount of such interest paid by the Borrower for such period. If such Lender pays such amount to the Administrative Agent, then such amount shall constitute such Lender’s Loan included in such Borrowing.

Section 2.06 Termination and Reduction of Aggregate Maximum Credit Amounts.

(a) Scheduled Termination of Commitments. Unless previously terminated, the Commitments shall terminate on the Maturity Date. If at any time the Aggregate Maximum Credit Amounts or the Borrowing Base is terminated or reduced to zero, then the Commitments shall terminate on the effective date of such termination or reduction.

(b) Optional Termination and Reduction of Aggregate Credit Amounts.

(i) The Borrower may at any time terminate, or from time to time reduce, the Aggregate Maximum Credit Amounts; provided that (A) each reduction of the Aggregate Maximum Credit Amounts shall be in an amount that is an integral multiple of $10,000,000 and (B) the Borrower shall not terminate or reduce the Aggregate Maximum Credit Amounts if, after giving effect to any concurrent prepayment of the Loans in accordance with Section 3.04(b), the total Revolving Credit Exposures would exceed the total Commitments.

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(ii) The Borrower shall notify the Administrative Agent of any election to terminate or reduce the Aggregate Maximum Credit Amounts under Section 2.06(b)(i) at least three Business Days prior to the effective date of such termination or reduction, specifying such election and the effective date thereof. Promptly following receipt of any notice, the Administrative Agent shall advise the Lenders of the contents thereof. Each notice delivered by the Borrower pursuant to this Section 2.06(b)(ii) shall be irrevocable; provided that a notice of reduction or termination of the Aggregate Maximum Credit Amounts delivered by the Borrower may state that such notice is conditioned upon the effectiveness of other credit facilities or other securities offerings, in which case such notice may be revoked by the Borrower (by at least one Business Day’s prior notice to the Administrative Agent on or prior to the specified effective date) if such condition is not satisfied. Any termination or reduction of the Aggregate Maximum Credit Amounts shall be permanent and may not be reinstated. Except for termination of a Defaulting Lender under Section 5.04(b), each reduction of the Aggregate Maximum Credit Amounts shall be made ratably among the Lenders in accordance with each Lender’s Applicable Percentage.

Section 2.07 Borrowing Base.

(a) Initial Borrowing Base. For the period from and including the Effective Date to but excluding the first Redetermination Date, the amount of the Borrowing Base shall be Three Hundred Fifty Million Dollars ($350,000,000). Notwithstanding the foregoing, the Borrowing Base may be subject to further adjustments from time to time pursuant to Section 2.07(e), Section 2.07(f), Section 8.12(c) or Section 9.11.

(b) Scheduled and Interim Redeterminations. Except as set forth in the following sentence, the Borrowing Base shall be redetermined semi-annually in accordance with this Section 2.07 (a “Scheduled Redetermination”), and, subject to Section 2.07(d), such redetermined Borrowing Base shall become effective and applicable to the Borrower, the Administrative Agent, the Issuing Bank and the Lenders on May 1st and November 1st of each year, commencing May 1, 2011. In addition, the Borrower may, by notifying the Administrative Agent thereof, and the Administrative Agent may, at the direction of the Required Lenders, by notifying the Borrower thereof, each elect to cause the Borrowing Base to be redetermined once between each Scheduled Redetermination (an “Interim Redetermination”) in accordance with this Section 2.07.

(i) Each Scheduled Redetermination and each Interim Redetermination shall be effectuated as follows: Upon receipt by the Administrative Agent of (A) the Reserve Report and the Reserve Report Certificate, and (B) such other reports, data and supplemental information, including, without limitation, the information provided pursuant to Section 8.11(c), as may, from time to time, be reasonably requested by the Majority Lenders (the Reserve Report, such certificate and such other reports, data and supplemental information being the “Engineering Reports”), the Administrative Agent shall evaluate the information contained in the Engineering Reports and shall in good faith propose a new Borrowing Base (the “Proposed Borrowing Base”) based upon such information and such other information (including, without limitation, the status of title information with respect to the Oil and Gas Properties as described

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in the Engineering Reports and the existence of any other Debt) as the Administrative Agent deems appropriate in its sole discretion consistent with its normal and customary oil and gas lending criteria as it exists at the particular time.

(ii) The Administrative Agent shall notify the Borrower and the Lenders of the Proposed Borrowing Base (the “Proposed Borrowing Base Notice”):

(A) in the case of a Scheduled Redetermination, (1) if the Administrative Agent shall have received the Engineering Reports required to be delivered by the Borrower pursuant to Section 8.11(a) and (c) in a timely manner, then on or before the April 15th and October 15th of such year following the date of delivery or (2) if the Administrative Agent shall not have received the Engineering Reports required to be delivered by the Borrower pursuant to Section 8.11(a) and (c) in a timely manner, then promptly after the Administrative Agent has received complete Engineering Reports from the Borrower and has had a reasonable opportunity to determine the Proposed Borrowing Base in accordance with Section 2.07(c)(i); and

(B) in the case of an Interim Redetermination, promptly, and in any event within fifteen (15) days, after the Administrative Agent has received the required Engineering Reports.

(iii) Any Proposed Borrowing Base that would increase the Borrowing Base then in effect must be approved or deemed to have been approved by all of the Lenders as provided in this Section 2.07(c)(iii); and any Proposed Borrowing Base that would decrease or maintain the Borrowing Base then in effect must be approved or be deemed to have been approved by the Required Lenders as provided in this Section 2.07(c)(iii). Upon receipt of the Proposed Borrowing Base Notice, each Lender shall have fifteen (15) days to agree with the Proposed Borrowing Base or disagree with the Proposed Borrowing Base by proposing an alternate Borrowing Base, and each Lender shall make its determination of the appropriate amount of the Borrowing Base consistent with each such Lender’s normal and customary oil and gas lending criteria as it exists at the particular time. If at the end of such 15-day period, any Lender has not communicated its approval or disapproval in writing to the Administrative Agent, such silence shall be deemed to be an approval of the Proposed Borrowing Base. If, at the end of such 15-day period, all of the Lenders, in the case of a Proposed Borrowing Base that would increase the Borrowing Base then in effect, or the Required Lenders, in the case of a Proposed Borrowing Base that would decrease or maintain the Borrowing Base then in effect, have approved or deemed to have approved (as aforesaid) the Proposed Borrowing Base, then the Proposed Borrowing Base shall become the new Borrowing Base, effective on the date specified in Section 2.07(d). If, however, at the end of such 15-day period, all of the Lenders or the Required Lenders, as applicable, have not approved or deemed to have approved (as aforesaid) the Proposed Borrowing Base, then the Administrative Agent shall poll the Lenders to ascertain the highest Borrowing Base then acceptable to all of the Lenders or a number of Lenders sufficient to constitute the Required Lenders, as applicable, and such amount shall become the new Borrowing Base, effective on the date specified in Section 2.07(d).

(d) Effectiveness of a Redetermined Borrowing Base. After a redetermined Borrowing Base is approved or is deemed to have been approved by all of the Lenders or the

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Required Lenders, as applicable, pursuant to Section 2.07(c)(iii), the Administrative Agent shall notify the Borrower and the Lenders of the amount of the redetermined Borrowing Base (the “New Borrowing Base Notice”), and such amount shall become the new Borrowing Base, effective and applicable to the Borrower, the Administrative Agent, the Issuing Bank and the Lenders:

(i) in the case of a Scheduled Redetermination, (A) if the Administrative Agent shall have received the Engineering Reports required to be delivered by the Borrower pursuant to Section 8.11(a) and (c) in a timely and complete manner, then on the May 1st or November 1st, as applicable, following such notice, or (B) if the Administrative Agent shall not have received the Engineering Reports required to be delivered by the Borrower pursuant to Section 8.11(a) and (c) in a timely and complete manner, then on the Business Day next succeeding delivery of such notice; and

(ii) in the case of an Interim Redetermination, on the Business Day next succeeding delivery of such notice.

Such amount shall then become the Borrowing Base until the next Scheduled Redetermination Date, the next Interim Redetermination Date or the next adjustment to the Borrowing Base under Section 2.07(e), Section 2.07(f), Section 8.12(c) or Section 9.11, whichever occurs first. Notwithstanding the foregoing, no Scheduled Redetermination or Interim Redetermination shall become effective until the New Borrowing Base Notice related thereto is received by the Borrower.

(e) Reduction of Borrowing Base Upon Issuance of Permitted Additional Senior Notes. Upon the issuance of any Permitted Additional Senior Notes in accordance with Section 9.02(f) (other than Senior Notes issued pursuant to an Exchange Offer or constituting Permitted Refinancing Debt up to the original principal amount of the refinanced Senior Notes), the Borrowing Base then in effect shall be reduced by an amount equal to the product of 0.25 multiplied by the stated principal amount of such Permitted Additional Senior Notes (without regard to any initial issue discount), and the Borrowing Base as so reduced shall become the new Borrowing Base immediately upon the date of such issuance, effective and applicable to the Borrower, the Administrative Agent, the Issuing Bank and the Lenders on such date until the next redetermination or modification thereof hereunder.

(f) Reduction of Borrowing Base Upon Hedge Position Cancellation Event. Upon the occurrence of a Hedge Position Cancellation Event, the Required Lenders shall have the right to reduce the Borrowing Base by an amount determined by the Required Lenders to be the value attributed to the positions that were cancelled pursuant to such Hedge Position Cancellation Event for purposes of determining the then-effective Borrowing Base.

Section 2.08 Letters of Credit.

(a) General. Subject to the terms and conditions set forth herein, the Borrower may request the issuance of dollar denominated Letters of Credit for its own account or for the account of any of its Restricted Subsidiaries, in a form reasonably acceptable to the Administrative Agent and the Issuing Bank, at any time and from time to time during the

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Availability Period; provided that the Borrower may not request the issuance, amendment (to extend the term or increase the amount), renewal or extension of Letters of Credit hereunder, and the Issuing Bank shall not issue, amend (to extend the term or increase the amount), renew or extend a Letter of Credit, if a Borrowing Base Deficiency exists at such time or would exist as a result thereof or if the LC Exposure would exceed the LC Commitment after giving effect thereto. Subject to the terms and conditions set forth herein, the Issuing Bank shall then arrange for the Letter of Credit to be issued on the Borrower’s behalf. In the event of any inconsistency between the terms and conditions of this Agreement and the terms and conditions of any form of letter of credit application or other agreement submitted by the Borrower to, or entered into by the Borrower with, the Issuing Bank relating to any Letter of Credit, the terms and conditions of this Agreement shall control.

(b) Notice of Issuance, Amendment, Renewal, Extension; Certain Conditions. To request the issuance of a Letter of Credit (or the amendment, renewal or extension of an outstanding Letter of Credit), the Borrower shall hand deliver or telecopy (or transmit by electronic communication, if arrangements for doing so have been approved by the Issuing Bank) to the Issuing Bank and the Administrative Agent (not less than three (3) Business Days in advance of the requested date of issuance, amendment, renewal or extension) a notice:

(i) requesting the issuance of a Letter of Credit or identifying the Letter of Credit to be amended, renewed or extended;

(ii) specifying the date of issuance, amendment, renewal or extension (which shall be a Business Day);

(iii) specifying the date on which such Letter of Credit is to expire (which shall comply with Section 2.08(c));

(iv) specifying the amount of such Letter of Credit;

(v) specifying the name and address of the beneficiary thereof and such other information as shall be necessary to prepare, amend, renew or extend such Letter of Credit; and

(vi) specifying the amount of the then effective Borrowing Base, the current total Revolving Credit Exposures (without regard to the requested Letter of Credit or the requested amendment, renewal or extension of an outstanding Letter of Credit) and the pro forma total Revolving Credit Exposures (giving effect to the requested Letter of Credit or the requested amendment, renewal or extension of an outstanding Letter of Credit).

Each such notice shall constitute a representation that, after giving effect to the requested issuance, amendment, renewal or extension, as applicable, (i) the LC Exposure shall not exceed the LC Commitment and (ii) the total Revolving Credit Exposures shall not exceed the total Commitments (i.e. the lesser of the Aggregate Maximum Credit Amounts and the then effective Borrowing Base).

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If requested by the Issuing Bank, the Borrower also shall submit a letter of credit application in a form acceptable to the Issuing Bank in connection with any request for a Letter of Credit.

(c) Expiration Date. Each Letter of Credit shall expire at or prior to the close of business on the earlier of (i) the date one year after the date of the issuance of such Letter of Credit (or, in the case of any renewal or extension thereof, one year after such renewal or extension) and (ii) unless satisfactorily collateralized in the Issuing Bank’s reasonable opinion, the date that is five Business Days prior to the Maturity Date; provided that any Letter of Credit with a one-year term may provide for the automatic renewal thereof for additional one-year periods (which shall in no event extend beyond the date referred to in clause (ii)).

(d) Participations. By the issuance of a Letter of Credit (or an amendment to a Letter of Credit increasing the amount thereof) and without any further action on the part of the Issuing Bank or the Lenders, the Issuing Bank hereby grants to each Lender, and each Lender hereby acquires from the Issuing Bank, a participation in such Letter of Credit equal to such Lender’s Applicable Percentage of the aggregate amount available to be drawn under such Letter of Credit. In consideration and in furtherance of the foregoing, each Lender hereby absolutely and unconditionally agrees to pay to the Administrative Agent, for the account of the Issuing Bank, such Lender’s Applicable Percentage of each LC Disbursement made by the Issuing Bank and not reimbursed by the Borrower on the date due as provided in Section 2.08(e), or of any reimbursement payment required to be refunded to the Borrower for any reason. Each Lender acknowledges and agrees that its obligation to acquire participations pursuant to this Section 2.08(d) in respect of Letters of Credit is absolute and unconditional and shall not be affected by any circumstance whatsoever, including any amendment, renewal or extension of any Letter of Credit or the occurrence and continuance of a Default, the existence of a Borrowing Base Deficiency or reduction or termination of the Commitments, and that each such payment shall be made without any offset, abatement, withholding or reduction whatsoever.

(e) Reimbursement. If the Issuing Bank shall make any LC Disbursement in respect of a Letter of Credit prior to 11:00 a.m., Houston time, then the Borrower shall reimburse such LC Disbursement by paying to the Administrative Agent an amount equal to such LC Disbursement not later than 4:00 p.m., Houston time, on the same Business Day, if the Borrower shall have received notice of such LC Disbursement prior to 12:00 noon, Houston time, on such date, or, if such notice has not been received by the Borrower prior to such time on such date, then not later than 12:00 noon, Houston time, on the Business Day immediately following the day that the Borrower receives such notice; provided that if such LC Disbursement is not less than $1,000,000, the Borrower shall, subject to the conditions to Borrowing set forth herein, be deemed to have requested, and the Borrower does hereby request under such circumstances, that such payment be financed with an ABR Borrowing in an equivalent amount and, to the extent so financed, the Borrower’s obligation to make such payment shall be discharged and replaced by the resulting ABR Borrowing. If the Borrower fails to make such payment when due, the Administrative Agent shall notify each Lender of the applicable LC Disbursement, the payment then

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due from the Borrower in respect thereof and such Lender’s Applicable Percentage thereof. Promptly following receipt of such notice, each Lender shall pay to the Administrative Agent its Applicable Percentage of the payment then due from the Borrower, in the same manner as provided in Section 2.05 with respect to Loans made by such Lender (and Section 2.05 shall apply, mutatis mutandis, to the payment obligations of the Lenders), and the Administrative Agent shall promptly pay to the Issuing Bank the amounts so received by it from the Lenders. Promptly following receipt by the Administrative Agent of any payment from the Borrower pursuant to this Section 2.08(e), the Administrative Agent shall distribute such payment to the Issuing Bank or, to the extent that Lenders have made payments pursuant to this Section 2.08(e) to reimburse the Issuing Bank, then to such Lenders and the Issuing Bank as their interests may appear. Any payment made by a Lender pursuant to this Section 2.08(e) to reimburse the Issuing Bank for any LC Disbursement (other than the funding of ABR Loans as contemplated above) shall not constitute a Loan and shall not relieve the Borrower of its obligation to reimburse such LC Disbursement.

(f) Obligations Absolute. The Borrower’s obligation to reimburse LC Disbursements as provided in Section 2.08(e) shall be absolute, unconditional and irrevocable, and shall be performed strictly in accordance with the terms of this Agreement under any and all circumstances whatsoever and irrespective of (i) any lack of validity or enforceability of any Letter of Credit, any Letter of Credit Agreement or this Agreement, or of any term or provision therein, (ii) any draft or other document presented under a Letter of Credit proving to be forged, fraudulent or invalid in any respect or any statement therein being untrue or inaccurate in any respect, (iii) payment by the Issuing Bank under a Letter of Credit against presentation of a draft or other document that appears on its face to comply, but does not comply, with the terms of such Letter of Credit or any Letter of Credit Agreement, or (iv) any other event or circumstance whatsoever, whether or not similar to any of the foregoing, that might, but for the provisions of this Section 2.08(f), constitute a legal or equitable discharge of, or provide a right of setoff against, the Borrower’s obligations hereunder. Neither the Administrative Agent, the Lenders nor the Issuing Bank, nor any of their Related Parties shall have any liability or responsibility by reason of or in connection with the issuance or transfer of any Letter of Credit or any payment or failure to make any payment thereunder (irrespective of any of the circumstances referred to in the preceding sentence), or any error, omission, interruption, loss or delay in transmission or delivery of any draft, notice or other communication under or relating to any Letter of Credit (including any document required to make a drawing thereunder), any error in interpretation of technical terms or any consequence arising from causes beyond the control of the Issuing Bank; provided that the foregoing shall not be construed to excuse the Issuing Bank from liability to the Borrower to the extent of any direct damages (as opposed to consequential damages, claims in respect of which are hereby waived by the Borrower to the extent permitted by applicable law) suffered by the Borrower that are caused by the Issuing Bank’s failure to exercise care when determining whether drafts and other documents presented under a Letter of Credit comply with the terms thereof. In furtherance of the foregoing and without limiting the generality thereof, the parties agree that, with respect to documents presented which appear on their face to be in substantial compliance with the terms of a Letter of Credit, the Issuing Bank may, in its sole discretion, either accept and make payment upon such documents without responsibility for further investigation, regardless of any notice or information to the contrary, or refuse to accept and make payment upon such documents if such documents are not in strict compliance with the terms of such Letter of Credit. The parties hereto expressly agree that, in the absence of gross negligence or willful misconduct on the part of the Issuing Bank (as finally determined by a court of

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competent jurisdiction), the Issuing Bank shall be deemed to have exercised all requisite care in each such determination.

(g) Disbursement Procedures. The Issuing Bank shall, promptly following its receipt thereof, examine all documents purporting to represent a demand for payment under a Letter of Credit. The Issuing Bank shall promptly notify the Administrative Agent and the Borrower by telephone (confirmed by telecopy) of such demand for payment and whether the Issuing Bank has made or will make an LC Disbursement thereunder; provided that any failure to give or delay in giving such notice shall not relieve the Borrower of its obligation to reimburse the Issuing Bank and the Lenders with respect to any such LC Disbursement.

(h) Interim Interest. If the Issuing Bank shall make any LC Disbursement, then, until the Borrower shall have reimbursed the Issuing Bank for such LC Disbursement (either with its own funds or a Borrowing under Section 2.08(e)), the unpaid amount thereof shall bear interest, for each day from and including the date such LC Disbursement is made to but excluding the date that the Borrower reimburses such LC Disbursement, at the rate per annum then applicable to ABR Loans. Interest accrued pursuant to this Section 2.08(h) shall be for the account of the Issuing Bank, except that interest accrued on and after the date of payment by any Lender pursuant to Section 2.08(e) to reimburse the Issuing Bank shall be for the account of such Lender to the extent of such payment.

(i) Replacement of the Issuing Bank. The Issuing Bank may be replaced at any time by written agreement among the Borrower, the Administrative Agent, the replaced Issuing Bank and the successor Issuing Bank. The Administrative Agent shall notify the Lenders of any such replacement of the Issuing Bank. At the time any such replacement shall become effective, the Borrower shall pay all unpaid fees accrued for the account of the replaced Issuing Bank pursuant to Section 3.05(b). From and after the effective date of any such replacement, (i) the successor Issuing Bank shall have all the rights and obligations of the Issuing Bank under this Agreement with respect to Letters of Credit to be issued thereafter and (ii) references herein to the term “Issuing Bank” shall be deemed to refer to such successor or to any previous Issuing Bank, or to such successor and all previous Issuing Banks, as the context shall require. After the replacement of the Issuing Bank hereunder, the replaced Issuing Bank shall remain a party hereto and shall continue to have all the rights and obligations of the Issuing Bank under this Agreement with respect to Letters of Credit issued by it prior to such replacement, but shall not be required to issue additional Letters of Credit.

(j) Cash Collateralization. If (i) any Event of Default shall occur and be continuing and the Borrower receives notice from the Administrative Agent or the Required Lenders demanding the deposit of cash collateral pursuant to this Section 2.08(j), or (ii) the Borrower is required to pay to the Administrative Agent the excess attributable to an LC Exposure in connection with any prepayment pursuant to Section 3.04(b), then the Borrower shall deposit, in an account with the Administrative Agent, in the name of the Administrative Agent and for the benefit of the Issuing Bank and the Lenders, an amount in cash equal to, in the case of an Event of Default, the LC Exposure, and in the case of a payment required by Section 3.04(b), the amount of such excess as provided in Section 3.04(b), as of such date; provided that the obligation to deposit such cash collateral shall become effective immediately, and such deposit shall become promptly due and payable, without demand or other notice of

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any kind, upon the occurrence of any Event of Default with respect to the Borrower or any other Credit Party described in Section 10.01(h) or Section 10.01(i). The Borrower hereby grants to the Administrative Agent, for the benefit of the Issuing Bank and the Lenders, an exclusive first priority and continuing perfected security interest in and Lien on such account and all cash, checks, drafts, certificates and instruments, if any, from time to time deposited or held in such account, all deposits or wire transfers made thereto, any and all investments purchased with funds deposited in such account, all interest, dividends, cash, instruments, financial assets and other Property from time to time received, receivable or otherwise payable in respect of, or in exchange for, any or all of the foregoing, and all proceeds, products, accessions, rents, profits, income and benefits therefrom, and any substitutions and replacements therefor. The Borrower’s obligation to deposit amounts pursuant to this Section 2.08(j) shall be absolute and unconditional, without regard to whether any beneficiary of any such Letter of Credit has attempted to draw down all or a portion of such amount under the terms of a Letter of Credit, and, to the fullest extent permitted by applicable law, shall not be subject to any defense or be affected by a right of set-off, counterclaim or recoupment which the Borrower or any other Credit Party may now or hereafter have against any such beneficiary, the Issuing Bank, the Administrative Agent, the Lenders or any other Person for any reason whatsoever. Such deposit shall be held as collateral securing the payment and performance of the Borrower’s and the Guarantor’s obligations under this Agreement and the other Loan Documents. The Administrative Agent shall have exclusive dominion and control, including the exclusive right of withdrawal, over such account. Other than any interest earned on the investment of such deposits, which investments shall be made at the option and sole discretion of the Administrative Agent and at the Borrower’s risk and expense, such deposits shall not bear interest. Interest or profits, if any, on such investments shall accumulate in such account. Moneys in such account shall be applied by the Administrative Agent to reimburse the Issuing Bank for LC Disbursements for which it has not been reimbursed and, to the extent not so applied, shall be held for the satisfaction of the reimbursement obligations of the Borrower for the LC Exposure at such time or, if the maturity of the Loans has been accelerated, be applied to satisfy other obligations of the Borrower and the Guarantors under this Agreement or the other Loan Documents. If on any date of determination after the Borrower has posted cash collateral, the amount of such cash collateral exceeds the LC Exposure, then the Administrative Agent shall release such excess to the Borrower within three (3) Business Days of its receipt of a request for such release.

ARTICLE III

Payments of Principal and Interest; Prepayments; Fees

Section 3.01 Repayment of Loans. The Borrower hereby unconditionally promises to pay to the Administrative Agent for the account of each Lender the then unpaid principal amount of each Loan on the Termination Date.

Section 3.02 Interest.

(a) ABR Loans. The Loans comprising each ABR Borrowing shall bear interest at the Alternate Base Rate plus the Applicable Margin, but in no event to exceed the Highest Lawful Rate.

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(b) Eurodollar Loans. The Loans comprising each Eurodollar Borrowing shall bear interest at the Adjusted LIBO Rate for the Interest Period in effect for such Borrowing plus the Applicable Margin, but in no event to exceed the Highest Lawful Rate.

(c) Post-Default Rate. Notwithstanding the foregoing, if an Event of Default has occurred and is continuing, or if any principal of or interest on any Loan or any fee or other amount payable by the Borrower or any Guarantor hereunder or under any other Loan Document is not paid when due, whether at stated maturity, upon acceleration or otherwise, then at the direction of the Required Lenders, all Loans outstanding, in the case of an Event of Default, and such overdue amount, in the case of a failure to pay amounts when due, shall bear interest, after as well as before judgment, at a rate per annum equal to two percent (2%) plus the rate applicable to ABR Loans as provided in Section 3.02(a), but in no event to exceed the Highest Lawful Rate.

(d) Interest Payment Dates. Accrued interest on each Loan shall be payable in arrears on each Interest Payment Date for such Loan and on the Termination Date; provided that (i) interest accrued pursuant to Section 3.02(c) shall be payable on demand, (ii) in the event of any repayment or prepayment of any Loan (other than an optional prepayment of an ABR Loan prior to the Termination Date), accrued interest on the principal amount repaid or prepaid shall be payable on the date of such repayment or prepayment, and (iii) in the event of any conversion of any Eurodollar Loan prior to the end of the current Interest Period therefor, accrued interest on such Loan shall be payable on the effective date of such conversion.

(e) Interest Rate Computations. All interest hereunder shall be computed on the basis of a year of 360 days, unless such computation would exceed the Highest Lawful Rate, in which case interest shall be computed on the basis of a year of 365 days (or 366 days in a leap year), except that interest computed by reference to the Alternate Base Rate at times when the Alternate Base Rate is based on the Prime Rate shall be computed on the basis of a year of 365 days (or 366 days in a leap year), and in each case shall be payable for the actual number of days elapsed (including the first day but excluding the last day). The applicable Alternate Base Rate, Adjusted LIBO Rate or LIBO Rate shall be determined by the Administrative Agent, and such determination shall be conclusive absent manifest error, and be binding upon the parties hereto.

Section 3.03 Alternate Rate of Interest. If prior to the commencement of any Interest Period for a Eurodollar Borrowing:

(a) the Administrative Agent determines (which determination shall be conclusive absent manifest error) that adequate and reasonable means do not exist for ascertaining the Adjusted LIBO Rate or the LIBO Rate for such Interest Period; or

(b) the Administrative Agent is advised by the Majority Lenders that the Adjusted LIBO Rate or LIBO Rate, as applicable, for such Interest Period will not adequately and fairly reflect the cost to such Lenders of making or maintaining their Loans included in such Borrowing for such Interest Period;

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then the Administrative Agent shall give notice thereof to the Borrower and the Lenders by telephone or telecopy as promptly as practicable thereafter and, until the Administrative Agent notifies the Borrower and the Lenders that the circumstances giving rise to such notice no longer exist, (i) any Interest Election Request that requests the conversion of any Borrowing to, or continuation of any Borrowing as, a Eurodollar Borrowing shall be ineffective, and (ii) if any Borrowing Request requests a Eurodollar Borrowing, such Borrowing shall be made either as an ABR Borrowing or at an alternate rate of interest determined by the Majority Lenders as their cost of funds.

Section 3.04 Prepayments.

(a) Optional Prepayments. Subject to any break funding costs payable pursuant to Section 5.02 and prior notice in accordance with Section 3.04(b), the Borrower shall have the right at any time and from time to time to (i) prepay ABR Loans in whole or in part, in a minimum aggregate amount of $1,000,000 or any integral multiple of $500,000 in excess thereof or, if less than $500,000, the remaining balance of the ABR Loans, and (ii) prepay any Eurodollar Borrowing in whole in or in part, in a minimum aggregate amount of $5,000,000 or any integral multiple of $1,000,000 in excess thereof or, if less than $1,000,000, the remaining balance of such Eurodollar Borrowing.

(b) Notice and Terms of Optional Prepayment. The Borrower shall notify the Administrative Agent by telephone (confirmed by telecopy) of any prepayment hereunder (i) in the case of prepayment of a Eurodollar Borrowing, not later than 12:00 noon, Houston time, three Business Days before the date of prepayment, or (ii) in the case of prepayment of ABR Loans, not later than 12:00 noon, Houston time, on the Business Day of such prepayment. Each such notice shall be irrevocable and shall specify the prepayment date and the principal amount of each Borrowing or portion thereof to be prepaid. Promptly following receipt of any such notice relating to a Borrowing, the Administrative Agent shall advise the Lenders of the contents thereof. Each optional prepayment of a Borrowing shall be applied ratably to the Loans included in the prepaid Borrowing. Prepayments shall be accompanied by accrued interest to the extent required by Section 3.02.

(i) If, after giving effect to any termination or reduction of the Aggregate Maximum Credit Amounts pursuant to Section 2.06(b), the total Revolving Credit Exposures exceeds the total Commitments, then the Borrower shall immediately (and in any event on the Business Day of such termination or reduction) (A) prepay the Borrowings on the date of such termination or reduction in an aggregate principal amount equal to such excess, and (B) if any excess remains after prepaying all of the Borrowings as a result of an LC Exposure, pay to the Administrative Agent on behalf of the Lenders an amount equal to such excess to be held as cash collateral as provided in Section 2.08(j).

(ii) Upon any redetermination of or adjustment to the amount of the Borrowing Base in accordance with Section 2.07 (other than in accordance with Section 2.07(e), Section 2.07(f) or Section 9.11) or Section 8.12(c), if the total Revolving Credit Exposures exceeds the redetermined or adjusted Borrowing Base, then the Borrower shall take one or more

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of the following actions to cure the Borrowing Base Deficiency: (A) deliver to the Administrative Agent reserve engineering and mortgages covering such oil and gas properties not previously evaluated by the Borrower in the immediately preceding Reserve Report with a value and quality satisfactory to the Lenders in their sole discretion sufficient to eliminate such Borrowing Base Deficiency or (B) prepay the Borrowings in an aggregate principal amount equal to such excess, and if any excess remains after prepaying all of the Borrowings as a result of an LC Exposure, pay to the Administrative Agent on behalf of the Lenders an amount equal to such excess to be held as cash collateral as provided in Section 2.08(j). The Borrower shall be obligated to make such prepayments either within 30 days or in six substantially equal monthly installments, with accrued interest thereon, the first of which shall be due on the thirtieth day following receipt of the New Borrowing Base Notice in accordance with Section 2.07(d); provided that all payments required to be made pursuant to this Section 3.04(c)(ii) must be made on or prior to the Termination Date.

(iii) Upon any adjustment to the Borrowing Base pursuant to Section 2.07(e), Section 2.07(f) or Section 9.11, if the total Revolving Credit Exposures exceeds the Borrowing Base as adjusted, then the Borrower shall (A) prepay the Borrowings in an aggregate principal amount equal to such excess, and (B) if any excess remains after prepaying all of the Borrowings as a result of an LC Exposure, pay to the Administrative Agent on behalf of the Lenders an amount equal to such excess to be held as cash collateral as provided in Section 2.08(j). The Borrower shall be obligated to make such prepayment and/or deposit of cash collateral (x) in the case of an adjustment to the Borrowing Base pursuant to Section 2.07(e), within one Business Day after the applicable Permitted Additional Senior Notes are issued, (y) in the case of an adjustment to the Borrowing Base pursuant to Section 2.07(f), within one Business Day after the date on which the Borrower receives written notice from the Administrative Agent of the reduced amount of the Borrowing Base and (z) in the case of an adjustment to the Borrowing Base pursuant to Section 9.11, within one Business Day of the date it or any of the Restricted Subsidiaries receives cash proceeds as a result of the applicable disposition; provided that all payments required to be made pursuant to this Section 3.04(c)(iii) must be made on or prior to the Termination Date.

(iv) Each prepayment of Borrowings pursuant to this Section 3.04(c) shall be applied, first, ratably to any ABR Borrowings then outstanding, and, second, to any Eurodollar Borrowings then outstanding, and if more than one Eurodollar Borrowing is then outstanding, to each such Eurodollar Borrowing in order of priority beginning with the Eurodollar Borrowing with the least number of days remaining in the Interest Period applicable thereto and ending with the Eurodollar Borrowing with the most number of days remaining in the Interest Period applicable thereto.

(v) Each prepayment of Borrowings pursuant to this Section 3.04(c) shall be applied ratably to the Loans included in the prepaid Borrowings. Prepayments pursuant to this Section 3.04(c) shall be accompanied by accrued interest to the extent required by Section 3.02.

(d) No Premium or Penalty. Prepayments permitted or required under this Section 3.04 shall be without premium or penalty, except as required under Section 5.02.

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Section 3.05 Fees.

(a) Commitment Fees. Subject to Section 4.03(c)(i), the Borrower agrees to pay to the Administrative Agent for the account of each Lender a commitment fee, which shall accrue at the rate per annum of 0.50% on the average daily amount of the unused amount of such Lender’s Commitment during the period from and including the date of this Agreement to but excluding the Termination Date. Accrued commitment fees shall be payable in arrears on the last day of March, June, September and December of each year and on the Termination Date, commencing on the first such date to occur after the date hereof. All commitment fees shall be computed on the basis of a year of 360 days, unless such computation would exceed the Highest Lawful Rate, in which case such commitment fees shall be computed on the basis of a year of 365 days (or 366 days in a leap year), and shall be payable for the actual number of days elapsed (including the first day but excluding the last day).

(b) Letter of Credit Fees. The Borrower agrees to pay (i) to the Administrative Agent for the account of each Lender a participation fee with respect to its participations in Letters of Credit, which shall accrue at a rate equal to the Applicable Margin used to determine the interest rate applicable from time to time to Eurodollar Loans on the average daily amount of such Lender’s LC Exposure (excluding any portion thereof attributable to unreimbursed LC Disbursements) during the period from and including the date of this Agreement to but excluding the later of the date on which such Lender’s Commitment terminates and the date on which such Lender ceases to have any LC Exposure; provided that notwithstanding the foregoing if an Event of Default has occurred and is continuing, or if any principal of or interest on any Loan or any fee or other amount payable by the Borrower or any Guarantor hereunder or under any other Loan Document is not paid when due, whether at stated maturity, upon acceleration or otherwise, then at the direction of the Required Lenders, the participation fee shall accrue at a rate equal to two percent (2%) plus the Applicable Margin for ABR Loans, but in no event to exceed the Highest Lawful Rate, (ii) to the Issuing Bank a fronting fee, which shall accrue at a rate of 0.25% per annum on the average daily amount of the LC Exposure (excluding any portion thereof attributable to unreimbursed LC Disbursements) during the period from and including the date of this Agreement to but excluding the later of the date of termination of the Commitments and the date on which there ceases to be any LC Exposure, provided that in no event shall such fee be less than $500.00 during any quarter, and (iii) to the Issuing Bank, for its own account, its standard fees with respect to the issuance, amendment, renewal or extension of any Letter of Credit or processing of drawings thereunder. Participation fees and fronting fees accrued through and including the last day of March, June, September and December of each year shall be payable on the third Business Day following such last day, commencing on the first such date to occur after the date of this Agreement; provided that all such fees shall be payable on the Termination Date and any such fees accruing after the Termination Date shall be payable on receipt of written demand setting forth such amounts with reasonable particularity. Any other fees payable to the Issuing Bank pursuant to this Section 3.05(b) shall be payable within 10 days after receipt of written demand setting forth such amounts with reasonable particularity. All participation fees and fronting fees shall be computed on the basis of a year of 360 days, unless such computation would exceed the Highest Lawful Rate, in which case such fees shall be computed on the basis of a year of 365 days (or 366 days in a leap year), and shall be payable for the actual number of days elapsed (including the first day but excluding the last day).

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(c) Administrative Agent Fees. The Borrower agrees to pay to the Administrative Agent, for its own account, fees payable in the amounts and at the times separately agreed upon between the Borrower and the Administrative Agent.

ARTICLE IV

Payments; Pro Rata Treatment; Sharing of Set-offs

Section 4.01 Payments Generally; Pro Rata Treatment; Sharing of Set-offs.

(a) Payments by the Borrower. The Borrower shall make each payment required to be made by it hereunder (whether of principal, interest, fees or, except as otherwise provided in Section 2.08(a), reimbursement of LC Disbursements, or of amounts payable under Section 5.01, Section 5.02, Section 5.03 or otherwise) prior to 12:00 noon, Houston time, on the date when due, in immediately available funds, without defense, deduction, recoupment, set-off or counterclaim. Fees, once paid, shall be fully earned and shall not be refundable under any circumstances. Any amounts received after such time on any date may, in the discretion of the Administrative Agent, be deemed to have been received on the next succeeding Business Day for purposes of calculating interest thereon. All such payments shall be made to the Administrative Agent at its offices specified in Section 12.01, except payments to be made directly to the Issuing Bank as expressly provided herein and except that payments pursuant to Section 5.01, Section 5.02, Section 5.03 and Section 12.03 shall be made directly to the Persons entitled thereto. The Administrative Agent shall distribute any such payments received by it for the account of any other Person to the appropriate recipient promptly following receipt thereof. If any payment hereunder shall be due on a day that is not a Business Day, the date for payment shall be extended to the next succeeding Business Day, and, in the case of any payment accruing interest, interest thereon shall be payable for the period of such extension. All payments hereunder shall be made in dollars.

(b) Application of Insufficient Payments. If at any time insufficient funds are received by and available to the Administrative Agent to pay fully all amounts of principal, unreimbursed LC Disbursements, interest and fees then due hereunder, such funds shall be applied (i) first, towards payment of interest and fees then due hereunder, ratably among the parties entitled thereto in accordance with the amounts of interest and fees then due to such parties, and (ii) second, towards payment of principal and unreimbursed LC Disbursements then due hereunder, ratably among the parties entitled thereto in accordance with the amounts of principal and unreimbursed LC Disbursements then due to such parties.

(c) Sharing of Payments by Lenders. If any Lender shall, by exercising any right of set-off or counterclaim or otherwise, obtain payment in respect of any principal of or interest on any of its Loans or participations in LC Disbursements resulting in such Lender receiving payment of a greater proportion of the aggregate amount of its Loans and participations in LC Disbursements and accrued interest thereon than the proportion received by any other Lender, then the Lender receiving such greater proportion shall purchase (for cash at face value) participations in the Loans and participations in LC Disbursements of other Lenders to the extent necessary so that the benefit of all such payments shall be shared by the Lenders ratably in accordance with the aggregate amount of principal of and accrued interest on their respective Loans and participations in LC Disbursements; provided that (i) if any such

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participations are purchased and all or any portion of the payment giving rise thereto is recovered, such participations shall be rescinded and the purchase price returned to the extent of such recovery, without interest, and (ii) the provisions of this Section 4.01(c) shall not be construed to apply to any payment made by the Borrower to a Lender pursuant to Section 5.04(b) or pursuant to and in accordance with the express terms of this Agreement or any payment obtained by a Lender as consideration for the assignment of or sale of a participation in any of its Loans or participations in LC Disbursements to any assignee or participant, other than to the Borrower or any other Credit Party or Affiliate thereof (as to which the provisions of this Section 4.01(c) shall apply). The Borrower consents to the foregoing and agrees, to the extent it may effectively do so under applicable law, that subject to Section 12.08, any Lender acquiring a participation pursuant to the foregoing arrangements may exercise against the Borrower rights of set-off and counterclaim with respect to such participation as fully as if such Lender were a direct creditor of the Borrower in the amount of such participation.

Section 4.02 Presumption of Payment by the Borrower. Unless the Administrative Agent shall have received notice from the Borrower prior to the date on which any payment is due to the Administrative Agent for the account of the Lenders or the Issuing Bank that the Borrower will not make such payment, the Administrative Agent may assume that the Borrower has made such payment on such date in accordance herewith and may, in reliance upon such assumption, distribute to the Lenders or the Issuing Bank, as the case may be, the amount due. In such event, if the Borrower has not in fact made such payment, then each of the Lenders or the Issuing Bank, as the case may be, severally agrees to repay to the Administrative Agent forthwith on demand the amount so distributed to such Lender or Issuing Bank with interest thereon, for each day from and including the date such amount is distributed to it to but excluding the date of payment to the Administrative Agent, at the greater of the Federal Funds Effective Rate and a rate determined by the Administrative Agent in accordance with banking industry rules on interbank compensation.

Section 4.03 Payments and Deductions to a Defaulting Lender.

(a) If any Lender shall fail to make any payment required to be made by it pursuant to Section 2.05(a), Section 2.08(d), Section 2.08(e) or Section 4.02 then the Administrative Agent may, in its discretion (notwithstanding any contrary provision hereof), apply any amounts thereafter received by the Administrative Agent for the account of such Lender to satisfy such Lender’s obligations under such Sections until all such unsatisfied obligations are fully paid in cash.

(b) If a Defaulting Lender (or a Lender who would be a Defaulting Lender but for the expiration of the relevant grace period) as a result of the exercise of a set-off shall have received a payment in respect of its Revolving Credit Exposure which results in its Revolving Credit Exposure being less than its Applicable Percentage of the aggregate Revolving Credit Exposures, then no payments will be made to such Defaulting Lender until such time as such Defaulting Lender shall have complied with Section 4.03(c) and all amounts due and owing to the Lenders has been equalized in accordance with each Lender’s respective pro rata share of the Obligations. Further, if at any time prior to the acceleration or maturity of the Loans, the Administrative Agent shall receive any payment in respect of principal of a Loan or a reimbursement of an LC Disbursement while one or more Defaulting Lenders shall be party to

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this Agreement, the Administrative Agent shall apply such payment first to the Borrowing(s) for which such Defaulting Lender(s) shall have failed to fund its pro rata share until such time as such Borrowing(s) are paid in full or each Lender (including each Defaulting Lender) is owed its Applicable Percentage of all Loans then outstanding. After acceleration or maturity of the Loans, subject to the first sentence of this Section 4.03(b), all principal will be paid ratably as provided in Section 10.02(c).

(c) Notwithstanding any provision of this Agreement to the contrary, if any Lender becomes a Defaulting Lender, then the following provisions shall apply for so long as such Lender is a Defaulting Lender:

(i) Fees shall cease to accrue on the unfunded portion of the Commitment of such Defaulting Lender pursuant to Section 3.05.

(ii) The Commitment, the Maximum Credit Amount and the outstanding principal balance of the Loans of, and the participation interests in Letters of Credit held by, such Defaulting Lender shall not be included in determining whether all Lenders, the Required Lenders or the Majority Lenders have taken or may take any action hereunder (including any consent to any amendment or waiver pursuant to Section 12.02); provided that any waiver, amendment or modification requiring the consent of each affected Lender shall require the consent of such Defaulting Lender if it is an affected Lender; and provided further that no Defaulting Lender shall participate in any redetermination or affirmation of the Borrowing Base, but the Commitment of any Defaulting Lender (i.e. such Defaulting Lender’s Applicable Percentage of the Borrowing Base) may not be increased without the consent of such Defaulting Lender.

(iii) If any LC Exposure exists at the time a Lender becomes a Defaulting Lender, then:

(A) all or any part of such LC Exposure shall be automatically reallocated (effective as of the date such Lender becomes a Defaulting Lender) among the Non-Defaulting Lenders in accordance with their respective Applicable Percentages but only to the extent (x) the sum of all Non-Defaulting Lenders’ Revolving Credit Exposures plus such Defaulting Lender’s LC Exposure does not exceed the total of all non-Defaulting Lenders’ Commitments and (y) no Default or Event of Default has occurred and is continuing at such time;

(B) if the reallocation described in clause (A) above cannot, or can only partially, be effected, then the Borrower shall, within three (3) Business Days following the Borrower’s receipt of written notice by the Administrative Agent, cash collateralize such Defaulting Lender’s LC Exposure (after giving effect to any partial reallocation pursuant to clause (A) above) in accordance with the procedures set forth in Section 2.08(j) for so long as such LC Exposure is outstanding;

(C) if the Borrower cash collateralizes any portion of such Defaulting Lender’s LC Exposure pursuant to this Section 4.03, then the Borrower shall not be required to pay any fees to such Defaulting Lender pursuant to Section 3.05(b) with respect to

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such Defaulting Lender’s LC Exposure during the period such Defaulting Lender’s LC Exposure is cash collateralized;

(D) if the LC Exposure of the non-Defaulting Lenders is reallocated pursuant to clause (A) above, then the fees payable to the Lenders pursuant to Section 3.05(a) and Section 3.05(b) shall be adjusted in accordance with such non-Defaulting Lenders’ Applicable Percentages after giving effect to such reallocation; or

(E) if any Defaulting Lender’s LC Exposure is neither cash collateralized nor reallocated pursuant to Section 4.03(c), then, without prejudice to any rights or remedies of the Issuing Bank or any Lender hereunder, all letter of credit fees payable under Section 3.05(b) with respect to such Defaulting Lender’s LC Exposure shall be payable to the Issuing Bank until such LC Exposure is cash collateralized and/or reallocated.

(d) So long as any Lender is a Defaulting Lender, the Issuing Bank shall not be required to issue, amend or increase any Letter of Credit, unless it is satisfied that the Defaulting Lender’s LC Exposure will be 100% covered by the Commitments of the Non-Defaulting Lenders and/or cash collateral will be provided by the Borrower in accordance with Section 4.03(c)(iii)(B), and participating interests in any such newly issued or increased Letter of Credit shall be allocated among Non-Defaulting Lenders in a manner consistent with Section 4.03 (c)(iii)(A) (and Defaulting Lenders shall not participate therein).

(e) In the event that the Administrative Agent, the Borrower and the Issuing Bank each agrees that a Defaulting Lender has adequately remedied all matters that caused such Lender to be a Defaulting Lender, then the LC Exposures of the Lenders shall be readjusted to reflect the inclusion of such Lender’s Commitment and on such date, if necessary as a result of a Loan funding pursuant to Section 2.08(e), such Lender shall purchase at par such of the Loans of the other Lenders as the Administrative shall determine may be necessary in order for such Lender to hold such Loans in accordance with its Applicable Percentage.

Section 4.04 Disposition of Proceeds. The Security Instruments contain an assignment by the Borrower and/or the Guarantors unto and in favor of the Administrative Agent for the benefit of the Lenders of all of the Borrower’s or each Guarantor’s interest in and to production and all proceeds attributable thereto which may be produced from or allocated to the Mortgaged Property. The Security Instruments further provide in general for the application of such proceeds to the satisfaction of the Obligations and other obligations described therein and secured thereby. Notwithstanding the assignment contained in such Security Instruments, (a) the Administrative Agent and the Lenders agree that, so long as no Event of Default has occurred and is continuing, they will neither notify the purchaser or purchasers of such production nor take any other action to cause such proceeds to be remitted to the Administrative Agent or the Lenders, but the Lenders will instead permit such proceeds to be paid to the relevant Credit Party and (b) the Lenders hereby authorize the Administrative Agent to take such actions as may be necessary to cause such proceeds to be paid to the relevant Credit Party so long as no Event of Default has occurred and is continuing.

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ARTICLE V

Increased Costs; Break Funding Payments; Taxes; Illegality

Section 5.01 Increased Costs.

(a) Eurodollar Changes in Law. If any Change in Law shall:

(i) impose, modify or deem applicable any reserve, special deposit or similar requirement against assets of, deposits with or for the account of, or credit extended by, any Lender (except any such reserve requirement reflected in the Adjusted LIBO Rate); or

(ii) impose on any Lender or the London interbank market any other condition affecting this Agreement or Eurodollar Loans made by such Lender;

and the result of any of the foregoing shall be to increase the cost to such Lender of making or maintaining any Eurodollar Loan (or of maintaining its obligation to make any such Loan) or to reduce the amount of any sum received or receivable by such Lender (whether of principal, interest or otherwise), then the Borrower will pay to such Lender such additional amount or amounts as will compensate such Lender for such additional costs incurred or reduction suffered.

(b) Capital Requirements. If any Lender or the Issuing Bank determines that any Change in Law regarding capital requirements has the effect of reducing the rate of return on such Lender’s or the Issuing Bank’s capital or on the capital of such Lender’s or the Issuing Bank’s holding company, if any, as a consequence of this Agreement or the Loans made by, or participations in Letters of Credit held by, such Lender, or the Letters of Credit issued by the Issuing Bank, to a level below that which such Lender or the Issuing Bank or such Lender’s or the Issuing Bank’s holding company could have achieved but for such Change in Law (taking into consideration such Lender’s or the Issuing Bank’s policies and the policies of such Lender’s or the Issuing Bank’s holding company with respect to capital adequacy), then from time to time the Borrower will pay to such Lender or the Issuing Bank, as the case may be, such additional amount or amounts as will compensate such Lender or the Issuing Bank or such Lender’s or the Issuing Bank’s holding company for any such reduction suffered.

(c) Certificates. A certificate of a Lender or the Issuing Bank setting forth in reasonable detail the computation of the amount or amounts necessary to compensate such Lender or the Issuing Bank or its holding company, as the case may be, as specified in Section 5.01(a) or (b) shall be delivered to the Borrower contemporaneously with any request for payment under Section 5.01(a) or (b). Such certificate shall be conclusive absent manifest error and state that such Lender or the Issuing Bank (as the case may be) is charging similar costs to similarly situated borrowers at such time. The Borrower shall pay such Lender or the Issuing Bank, as the case may be, the amount shown as due on any such certificate within 30 days after receipt thereof.

(d) Effect of Failure or Delay in Requesting Compensation. Failure or delay on the part of any Lender or the Issuing Bank to demand compensation pursuant to this Section 5.01 shall not constitute a waiver of such Lender’s or the Issuing Bank’s right to demand such compensation; provided that the Borrower shall not be required to compensate a Lender or the Issuing Bank pursuant to this Section 5.01 for any increased costs or reductions incurred more

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than 180 days prior to the date that such Lender or the Issuing Bank, as the case may be, notifies the Borrower of the Change in Law giving rise to such increased costs or reductions and of such Lender’s or the Issuing Bank’s intention to claim compensation therefor; provided further that, if the Change in Law giving rise to such increased costs or reductions is retroactive, then the 180-day period referred to above shall be extended to include the period of retroactive effect thereof.

Section 5.02 Break Funding Payments. In the event of (a) the payment of any principal of any Eurodollar Loan or an assignment of any Eurodollar Loan pursuant to Section 5.04(b) in each case other than on the last day of an Interest Period applicable thereto (including as a result of an Event of Default), (b) the conversion of any Eurodollar Loan into an ABR Loan other than on the last day of the Interest Period applicable thereto, or (c) the failure to borrow (for a reason other than the failure of a Lender to make a Loan when obligated to do so), convert, continue or prepay any Eurodollar Loan on the date specified in any notice delivered pursuant hereto, then, in any such event, the Borrower shall compensate each Lender for the loss, cost and expense attributable to such event. In the case of a Eurodollar Loan, such loss, cost or expense to any Lender shall be deemed to include an amount determined by such Lender to be the excess, if any, of (i) the amount of interest which would have accrued on the principal amount of such Loan had such event not occurred, at the Adjusted LIBO Rate that would have been applicable to such Loan, for the period from the date of such event to the last day of the then current Interest Period therefor (or, in the case of a failure to borrow, convert or continue, for the period that would have been the Interest Period for such Loan), over (ii) the amount of interest which would accrue on such principal amount for such period at the interest rate which such Lender would bid were it to bid, at the commencement of such period, for dollar deposits of a comparable amount and period from other banks in the eurodollar market.

A certificate of any Lender setting forth in reasonable detail the computation of any amount or amounts that such Lender is entitled to receive pursuant to this Section 5.02 shall be delivered to the Borrower contemporaneously with any request for payment under this Section 5.02. Such certificate shall be conclusive absent manifest error and state that such Lender or the Issuing Bank (as the case may be) is charging similar costs to similarly situated borrowers at such time. The Borrower shall pay such Lender the amount shown as due on any such certificate within 30 days after receipt thereof.

Section 5.03 Taxes.

(a) Payments Free of Taxes. Any and all payments by or on account of any obligation of the Borrower or any Guarantor under any Loan Document shall to the extent permitted by applicable law be made free and clear of and without deduction for any Indemnified Taxes or Other Taxes; provided that if the Borrower or any Guarantor shall be required to deduct any Indemnified Taxes or Other Taxes from such payments, then (i) the sum payable shall be increased as necessary so that after making all such deductions (including deductions applicable to additional sums payable under this Section 5.03(a)), the Administrative Agent, Lender or Issuing Bank (as the case may be) receives an amount equal to the sum it would have received had no such deductions been required, (ii) the Borrower or such Guarantor shall make such deductions and (iii) the Borrower or such Guarantor shall pay

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the full amount deducted to the relevant Governmental Authority in accordance with applicable law.

(b) Payment of Other Taxes by the Borrower. The Borrower shall pay any Other Taxes to the relevant Governmental Authority in accordance with applicable law.

(c) Indemnification by the Borrower. The Borrower shall indemnify the Administrative Agent, each Lender and the Issuing Bank, within 30 days after written demand therefor, which demand shall contain an invoice setting forth in reasonable detail the amounts subject to indemnification under this Section 5.03(c), for the full amount of any Indemnified Taxes or Other Taxes paid by the Administrative Agent, such Lender or the Issuing Bank, as the case may be, on or with respect to any payment by or on account of any obligation of the Borrower hereunder (including Indemnified Taxes or Other Taxes imposed or asserted on or attributable to amounts payable under this Section 5.03) and any penalties that are not the fault of such indemnified Person, interest and reasonable expenses arising therefrom or with respect thereto, whether or not such Indemnified Taxes or Other Taxes were correctly or legally imposed or asserted by the relevant Governmental Authority. For the avoidance of doubt, no indemnification shall be required under this Section 5.03(c) for any and all present or future stamp or documentary taxes or any other excise or Property taxes, charges or similar levies arising from any transfer of an interest hereunder between parties unrelated to the Borrower. A certificate of the Administrative Agent, a Lender or the Issuing Bank setting forth in reasonable detail the calculations of the amount of such payment or liability under this Section 5.03 shall be delivered to the Borrower contemporaneously with any request for payment under this Section 5.03 and shall be conclusive absent manifest error.

(d) Evidence of Payments. As soon as practicable after any payment of Indemnified Taxes or Other Taxes by the Borrower or a Guarantor to a Governmental Authority, the Borrower shall deliver to the Administrative Agent the original or a certified copy of a receipt issued by such Governmental Authority evidencing such payment, a copy of the return reporting such payment or other evidence of such payment reasonably satisfactory to the Administrative Agent.

(e) Tax Documentation. Each Lender that is a “United States person” within the meaning of Section 7701(a)(30) of the Code and is not an exempt recipient described under Section 1.6049-4(c)(1)(ii)(m) of the Treasury Regulations shall deliver to the Borrower (with a copy to the Administrative Agent), at the time or times prescribed by applicable law, properly completed and executed originals of Internal Revenue Service Form W-9 or such other documentation prescribed by applicable law or reasonably requested by the Borrower as will enable the Borrower to determine that such Lender is not subject to backup withholding or information reporting requirements. Each Foreign Lender that is entitled to an exemption from or reduction of withholding tax under the law of the jurisdiction in which the Borrower is located, or any treaty to which such jurisdiction is a party, with respect to payments under this Agreement or any other Loan Document shall deliver to the Borrower (with a copy to the Administrative Agent), at the time or times prescribed by applicable law, such properly completed and executed documentation prescribed by applicable law or reasonably requested by the Borrower as will permit such payments to be made without withholding or at a reduced rate.

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If a payment made to a Lender or other recipient by or on account of any obligation of the Borrower hereunder or under any other Loan Document would be subject to U.S. federal withholding tax imposed by FATCA if such Lender or other recipient were to fail to comply with the applicable reporting requirements of FATCA (including those contained in Section 1471(b) or 1472(b) of the Code, as applicable), such Lender or other recipient shall deliver to the Borrower and the Administrative Agent at the time or times prescribed by law and at such time or times reasonably requested by the Borrower or the Administrative Agent such documentation prescribed by applicable law (including as prescribed by Section 1471(b)(3)(C)(i) of the Code) and such additional documentation reasonably requested by the Borrower or the Administrative Agent as may be necessary for the Borrower and the Administrative Agent to comply with their obligations under FATCA and to determine that such Lender or other recipient has or has not complied with its obligations under FATCA or to determine the amount to deduct and withhold from such payment. Solely for purposes of this Section 5.03(e), “FATCA” shall include amendments made to FATCA after the date of this Agreement.

(f) Tax Refunds. If the Administrative Agent or a Lender determines, in its sole discretion, that it has received a refund of any Taxes or Other Taxes as to which it has been indemnified by the Borrower or with respect to which the Borrower has paid additional amounts pursuant to this Section 5.03, it shall promptly pay over an amount equal to such refund to the Borrower (but only to the extent of indemnity payments made, or additional amounts paid, by the Borrower under this Section 5.03 with respect to the Taxes or Other Taxes giving rise to such refund), net of all reasonable out-of-pocket expenses in connection therewith of the Administrative Agent or such Lender and without interest (other than any interest paid by the relevant Governmental Authority with respect to such refund); provided, that the Borrower, upon the request of the Administrative Agent or such Lender, agrees to repay the amount paid over to the Borrower (plus any penalties that are not the fault of such Person, interest, or other charges imposed by the relevant Governmental Authority) to the Administrative Agent or such Lender in the event the Administrative Agent or such Lender is required to repay such refund to such Governmental Authority. This Section 5.03 shall not be construed to require the Administrative Agent or any Lender to make available its tax returns (or any other information relating to its taxes which it deems confidential) to the Borrower or any other Person.

Section 5.04 Mitigation Obligations; Replacement of Lenders.

(a) Designation of Different Lending Office. If any Lender requests compensation under Section 5.01, or if the Borrower is required to pay any additional amount to any Lender or any Governmental Authority for the account of any Lender pursuant to Section 5.03, then such Lender shall use reasonable efforts to designate a different lending office for funding or booking its Loans hereunder or to assign its rights and obligations hereunder to another of its offices, branches or affiliates, if, in the reasonable judgment of such Lender, such designation or assignment (i) would eliminate or reduce amounts payable pursuant to Section 5.01 or Section 5.03, as the case may be, in the future and (ii) would not subject such Lender to any unreimbursed cost or expense and would not otherwise be disadvantageous to such Lender in any material respect. The Borrower hereby agrees to pay all

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reasonable costs and expenses incurred by any Lender in connection with any such designation or assignment.

(b) Replacement of Lenders. If (i) any Lender requests compensation under Section 5.01, (ii) the Borrower is required to pay any additional amount to any Lender or any Governmental Authority for the account of any Lender pursuant to Section 5.03, (iii) any Lender asserts an illegality under Section 5.05, (iv) any Lender is a Defaulting Lender, (v) any Lender does not consent to any proposed increase in or reaffirmation of the Borrowing Base, (vi) in connection with any consent to or approval of any proposed amendment, waiver, consent or release with respect to any Loan Document that requires the consent of each Lender or the consent of each Lender affected thereby, the consent of the Required Lenders shall have been obtained but any Lender has not so consented to or approved such proposed amendment, waiver, consent or release, or (vii) in connection with any consent to or approval of any proposed amendment, waiver, consent or release with respect to any Loan Document that requires the consent of the Required Lenders, the consent of the Majority Lenders shall have been obtained but any Lender has not so consented to or approved such proposed amendment, waiver, consent or release, then in any such case, the Borrower may, at its sole expense and effort, upon notice to such Lender and the Administrative Agent, require such Lender to assign and delegate, without recourse (in accordance with and subject to the restrictions contained in Section 12.04), all its interests, rights and obligations under this Agreement to an assignee that shall assume such obligations (which assignee may be another Lender, if such Lender accepts such assignment); provided that (i) the Borrower shall have received the prior written consent of the Administrative Agent, which consent shall not unreasonably be withheld, (ii) such Lender shall have received payment of an amount equal to the outstanding principal of its Loans and participations in LC Disbursements, accrued interest thereon, accrued fees and all other amounts payable to it hereunder, from the assignee (to the extent of such outstanding principal and accrued interest and fees) or the Borrower (in the case of all other amounts) and (iii) in the case of any such assignment resulting from a claim for compensation under Section 5.01, for payments required to be made pursuant to Section 5.03 or an illegality under Section 5.05, such assignment will result in a reduction in such compensation or payments or avoid the illegality. A Lender shall not be required to make any such assignment and delegation if, prior thereto, as a result of a waiver by such Lender or otherwise, the circumstances entitling the Borrower to require such assignment and delegation cease to apply. Each Lender hereby agrees to make such assignment and delegations required under this Section 5.04(b).

Section 5.05 Illegality. Notwithstanding any other provision of this Agreement, in the event that it becomes unlawful for any Lender or its applicable lending office to honor its obligation to make or maintain Eurodollar Loans either generally or having a particular Interest Period hereunder, then (a) such Lender shall promptly notify the Borrower and the Administrative Agent thereof and such Lender’s obligation to make such Eurodollar Loans shall be suspended (the “Affected Loans”) until such time as such Lender may again make and maintain such Eurodollar Loans and (b) all Affected Loans which would otherwise be made by such Lender shall be made instead as ABR Loans (and, if such Lender so requests by notice to the Borrower and the Administrative Agent, all Affected Loans of such Lender then outstanding shall be automatically converted into ABR Loans on the last day of the then current Interest Period for such Affected Loan) and, to the extent that Affected Loans are so made as (or

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converted into) ABR Loans, all payments of principal which would otherwise be applied to such Lender’s Affected Loans shall be applied instead to its ABR Loans.

ARTICLE VI

Conditions Precedent

Section 6.01 Effective Date. The obligations of the Lenders to make Loans and of the Issuing Bank to issue Letters of Credit hereunder shall not become effective until the date on which each of the following conditions is satisfied (or waived in accordance with Section 12.02):

(a) The Administrative Agent, the Arranger and the Lenders shall have received all fees and amounts due and payable on or prior to the Effective Date, including, to the extent invoiced prior to the Effective Date, reimbursement or payment of all out-of-pocket expenses required to be reimbursed or paid by the Borrower hereunder (including, without limitation, to the extent invoiced prior to the Effective Date, the fees and expenses of Xxxxxx & Xxxxxx L.L.P., counsel to the Administrative Agent).

(b) The Administrative Agent shall have received a certificate of the Secretary or an Assistant Secretary of the Borrower and each Guarantor setting forth (i) resolutions of its board of directors with respect to the authorization of the Borrower or such Guarantor to execute and deliver the Loan Documents to which it is a party and to perform its obligations under such Loan Documents, (ii) the officers of the Borrower or such Guarantor (y) who are authorized to sign the Loan Documents to which the Borrower or such Guarantor is a party and (z) who will, until replaced by another officer or officers duly authorized for that purpose, act as its representative for the purposes of signing documents and giving notices and other communications in connection with this Agreement and the transactions contemplated hereby, (iii) specimen signatures of such authorized officers, and (iv) the Organizational Documents of the Borrower or such Guarantor, certified as being true and complete. The Administrative Agent and the Lenders may conclusively rely on such certificate until the Administrative Agent receives notice in writing from the Borrower to the contrary.

(c) The Administrative Agent shall have received certificates of the appropriate State agencies of each of the States in which the Borrower or applicable Guarantor, as the case may be, is organized with respect to the existence, qualification and good standing of the Borrower and each Guarantor.

(d) The Administrative Agent shall have received a compliance certificate which shall be substantially in the form of Exhibit D, duly and properly executed by a Responsible Officer and dated as of the date of Effective Date.

(e) The Administrative Agent shall have received from each party hereto counterparts (in such number as may be requested by the Administrative Agent) of this Agreement signed on behalf of such party.

(f) The Administrative Agent shall have received from each party thereto duly executed counterparts (in such number as may be requested by the Administrative Agent) of the Guaranty Agreement and the other Security Instruments described on Exhibit F-1. In

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connection with the execution and delivery of such Security Instruments, the Administrative Agent shall:

(i) be reasonably satisfied that such Security Instruments create first priority, perfected Liens (provided that Liens which are permitted by the terms of Section 9.03 to attach to the Mortgaged Properties may exist and have whatever priority such Liens have at such time under applicable law) on at least 80% of the total value of the Oil and Gas Properties of the Borrower and the Restricted Subsidiaries evaluated in the Initial Reserve Report; and

(ii) have received certificates, together with undated, blank stock powers for each such certificate, representing all of the issued and outstanding Equity Interests of each of the Guarantors, to the extent such Equity Interests are certificated.

(g) The Administrative Agent shall have received an opinion of Xxxxx Xxxxx L.L.P., special counsel to the Borrower, substantially in the form of Exhibit E hereto.

(h) The Administrative Agent shall have received a certificate of insurance coverage of the Borrower evidencing that the Borrower is carrying insurance in accordance with Section 7.12.

(i) The Administrative Agent shall have received title information in form and substance reasonably acceptable to the Administrative Agent (it being understood that title information with respect to Oil and Gas Properties of the Borrower and the Restricted Subsidiaries located in the Xxxxxxx Shale prepared in accordance with the Title Policies and Procedures shall be acceptable to the Administrative Agent) setting forth the status of title to at least 75% of the total value of the Oil and Gas Properties evaluated in the Initial Reserve Report. It is understood and agreed that title information with respect to Oil and Gas Properties of the Borrower and the Restricted Subsidiaries located in the Xxxxxxx Shale shall be deemed satisfactory if such title information meets the qualifications described in the Title Policies and Procedures for establishment of satisfactory title such that no additional curative actions need be taken pursuant to the requirements set forth in the Title Policies and Procedures.

(j) The Administrative Agent shall have received a certificate of a Responsible Officer certifying that the Credit Parties have received all consents and approvals required by Section 7.03.

(k) The Administrative Agent shall have received (i) the financial statements referred to in Section 7.04(a) and (ii) the Initial Reserve Report accompanied by a Reserve Report Certificate.

(l) The Administrative Agent shall have received appropriate UCC search reports from the jurisdiction of organization of each of the Credit Parties reflecting no prior Liens (other than those being assigned or released on or prior to the Effective Date or Liens permitted by Section 9.03) encumbering the Properties of such Credit Party.

(m) The Administrative Agent shall have received evidence that, on the date of the initial funding of Loans hereunder, (i) the loans and other Debt of the Borrower outstanding under the Existing Credit Agreement shall be paid in full with the proceeds of such initial

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funding, (ii) the commitments of the lenders thereunder shall be terminated and (iii) all Liens securing the Existing Credit Agreement shall be released.

(n) The Administrative Agent shall be reasonably satisfied that, after giving effect to the making of the Loans to be made on the Effective Date, the application of the proceeds thereof and the issuance of any Letters of Credit to be issued on the Effective Date, Availability will be greater than or equal to the greater of (i) 10% of the Borrowing Base and (ii) $25,000,000.

(o) The Administrative Agent shall have received a certificate of a Responsible Officer certifying it has not assigned, terminated, sold or unwound any hedge position under any Hedge Agreement disclosed to the Lenders on January 14, 2011 in a report prepared by Asset Risk Management and has not created any off-setting position (whether evidenced by a floor, put or Hedge Agreement) with respect to any such hedge position if the effect of such action, after taking into account the net hedging position under all Hedge Agreements of the Borrower and the Restricted Subsidiaries outstanding on the Effective Date taken as a whole (including any other Hedge Agreements executed contemporaneously with the taking of such action), was to cancel any of the Borrower’s or any of the Restricted Subsidiaries’ positions under such Hedging Agreements.

(p) The Administrative Agent shall have received such other documents as the Administrative Agent or special counsel to the Administrative Agent may reasonably request.

The Administrative Agent shall notify the Borrower and the Lenders promptly of the occurrence of the Effective Date, and such notice shall be conclusive and binding. Notwithstanding the foregoing, the obligations of the Lenders to make Loans and of the Issuing Bank to issue Letters of Credit hereunder shall not become effective unless each of the foregoing conditions is satisfied (or waived pursuant to Section 12.02) at or prior to 2:00 p.m., Houston time, on February 19, 2011 (and, in the event such conditions are not so satisfied or waived, the Commitments shall terminate at such time).

Section 6.02 Each Credit Event. The obligation of each Lender to make a Loan on the occasion of any Borrowing (including the initial funding), and of the Issuing Bank to issue, amend (to increase the amount or extend the term), renew or extend any Letter of Credit, is subject to the satisfaction of the following conditions:

(a) At the time of and immediately after giving effect to such Borrowing or the issuance, amendment, renewal or extension of such Letter of Credit, as applicable, no Default or Event of Default shall have occurred and be continuing.

(b) With respect to Loans made and/or Letters of Credit issued on the Effective Date, the representations and warranties of the Borrower and the Guarantors set forth in this Agreement and in the other Loan Documents shall be true and correct on and as of the Effective Date, except to the extent any such representations and warranties are expressly limited to an earlier date, in which case, on and as of the Effective Date, such representations and warranties shall continue to be true and correct as of such specified earlier date, and (ii) with respect to any Borrowing or issuance, amendment, renewal or extension of any Letter of

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Credit after the Effective Date, the representations and warranties of the Borrower and the Guarantors set forth in this Agreement and in the other Loan Documents shall be true and correct in all material respects on and as of the date of such Borrowing or the date of issuance, amendment, renewal or extension of such Letter of Credit, as applicable, except to the extent any such representations and warranties are expressly limited to an earlier date, in which case, on and as of the date of such Borrowing or the date of issuance, amendment, renewal or extension of such Letter of Credit, as applicable, such representations and warranties shall continue to be true and correct in all material respects as of such specified earlier date.

(c) The receipt by the Administrative Agent of a Borrowing Request in accordance with Section 2.03 or a request for a Letter of Credit in accordance with Section 2.08(b), as applicable.

Each request for a Borrowing and each request for the issuance, amendment (to increase the amount or extend the term), renewal or extension of any Letter of Credit shall be deemed to constitute a representation and warranty by the Borrower on the date thereof as to the matters specified in Sections 6.02(a) and 6.02(b).

ARTICLE VII

Representations and Warranties

The Borrower represents and warrants to the Lenders that:

Section 7.01 Organization; Powers. Each of the Borrower and its Restricted Subsidiaries (a) is validly existing and in good standing under the laws of the jurisdiction of its organization and (b) has all requisite power and authority, and has all material governmental licenses, authorizations, consents and approvals necessary, to own its assets and to carry on its business as conducted at the time in question, and is qualified to do business in, and is in good standing in, every jurisdiction where such qualification is required, except where failure to have such power, authority, licenses, authorizations, consents, approvals and qualifications could not reasonably be expected to have a Material Adverse Effect.

Section 7.02 Authority; Enforceability. The Transactions are within each Credit Party’s corporate or limited liability company powers and have been duly authorized by all necessary corporate or limited liability company and, if required, stockholder or member action. Each Loan Document to which any Credit Party is a party has been duly executed and delivered by such Credit Party and constitutes a legal, valid and binding obligation of such Credit Party, enforceable in accordance with its terms, subject to applicable bankruptcy, insolvency, reorganization, moratorium or other laws affecting creditors’ rights generally and subject to general principles of equity, regardless of whether considered in a proceeding in equity or at law.

Section 7.03 Approvals; No Conflicts. The Transactions (a) do not require any consent or approval of, registration or filing with, or any other action by, any Governmental Authority or any other third Person (including shareholders or any class of directors, whether interested or disinterested, of the Borrower or any other Person), nor is any such consent, approval, registration, filing or other action necessary for the validity or enforceability of any Loan Document or the consummation of the transactions contemplated thereby, except (i) such as have

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been obtained or made and are in full force and effect, (ii) the recordings and filings necessary to perfect the Liens created pursuant to the Security Instruments, (iii) those third party approvals or consents which, if not made or obtained, would not cause a Default hereunder or could not reasonably be expected to have a Material Adverse Effect and (iv) the filing of any required documents with the SEC, (b) will not violate any applicable law or regulation or the Organizational Documents of the Borrower or any Restricted Subsidiary or any order of any Governmental Authority binding upon the Borrower or any Restricted Subsidiary (except for such violations that would not reasonably be expected to have a Material Adverse Effect), (c) will not violate or result in a default under any indenture, agreement or other instrument evidencing Material Indebtedness binding upon the Borrower or any Restricted Subsidiary or its Properties, or give rise to a right thereunder to require any payment to be made by the Borrower or such Restricted Subsidiary and (d) will not result in the creation or imposition of any Lien on any Property of the Borrower or any Restricted Subsidiary (other than the Liens created by the Loan Documents).

Section 7.04 Financial Condition; No Material Adverse Change.

(a) The Borrower has heretofore furnished to the Lenders (i) its consolidated balance sheet and related statements of operations, stockholders’ equity and cash flows as of and for the fiscal year ended December 31, 2009 and reported on by KPMG, LLP, independent public accountants and (ii) its unaudited consolidated balance sheet and related statements of operations and cash flows as of and for the fiscal quarter ended September 30, 2010. Such financial statements present fairly, in all material respects, the financial position and results of operations and cash flows of the Borrower and its consolidated Subsidiaries as of such date and for such period in accordance with GAAP.

(b) Since December 31, 2009, there has been no event, development or circumstance that has had a Material Adverse Effect.

(c) As of the date of this Agreement, other than the Borrower’s $400,000,000 8.625% Senior Notes due 2018, neither the Borrower nor any Restricted Subsidiary has any material Debt (including Disqualified Capital Stock) or any material contingent liabilities, material off-balance sheet liabilities or partnerships, material liabilities for taxes, material unusual forward or long-term commitments or material unrealized or anticipated losses from any unfavorable commitments, that are required to be disclosed in the Financial Statements by GAAP and are not so referred to or reflected or provided for in the Financial Statements or otherwise disclosed prior to the date hereof in writing to the Administrative Agent and the Lenders.

Section 7.05 Litigation.

(a) Except as set forth on Schedule 7.05, there are no actions, suits, investigations or proceedings by or before any arbitrator or Governmental Authority pending against or, to the knowledge of the Borrower, threatened, in writing, against or affecting the Borrower or any of the Restricted Subsidiaries (i) not fully covered by insurance (except for normal deductibles) as to which there is a reasonable possibility of an adverse determination

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that, if adversely determined, could reasonably be expected, individually or in the aggregate, to result in a Material Adverse Effect, or (ii) that involve any Loan Document or the Transactions.

(b) Since the date of this Agreement, there has been no change in the status of the matters disclosed in Schedule 7.05 that, individually or in the aggregate, has resulted in, or could reasonably be expected to result in, a Material Adverse Effect.

Section 7.06 Environmental Matters. Except for such matters as set forth on Schedule 7.06 or that, individually or in the aggregate, could not reasonably be expected to have a Material Adverse Effect:

(a) the Borrower and the Restricted Subsidiaries and each of their respective Properties and operations thereon are, and to the knowledge of the Borrower, within all applicable statute of limitation periods have been, in compliance with all applicable Environmental Laws.

(b) the Borrower and the Restricted Subsidiaries have obtained all Environmental Permits required for their respective operations and each of their Properties (it being understood that the term “Properties” as used in this Section 7.06 shall not include surface interests owned by Persons other than the Borrower or any Restricted Subsidiary lying over any mineral interests of the Borrower or any Restricted Subsidiary), with all such Environmental Permits being currently in full force and effect, and no Responsible Officer of the Borrower has received any written notice or otherwise has knowledge that any such existing Environmental Permit will be revoked or that any application for any new Environmental Permit or renewal of any existing Environmental Permit will be protested or denied.

(c) there are no claims, demands, suits, orders, inquiries, or proceedings concerning any violation of, or any liability (including as a potentially responsible party) under, any applicable Environmental Laws that is pending or, to the knowledge of a Responsible Officer of the Borrower, threatened, in writing, against the Borrower or any of the Restricted Subsidiaries or any of their respective Properties or as a result of any operations at such Properties.

(d) none of the Properties of the Borrower or any of the Restricted Subsidiaries contains or, to the knowledge of a Responsible Officer of the Borrower, has contained any (i) underground storage tanks; (ii) asbestos containing materials; (iii) landfills or dumps; (iv) hazardous waste management units as defined pursuant to RCRA or any comparable state law or (v) sites on or nominated for the National Priority List promulgated pursuant to CERCLA or any state remedial priority list promulgated or published pursuant to any comparable state law.

(e) there has been no Release or threatened Release of Hazardous Materials at, on, under or from any Credit Party’s Properties, there are no investigations, remediations, abatements, removals or monitorings of Hazardous Materials required under applicable Environmental Laws at such Properties, and none of such Properties are adversely affected by any Release or threatened Release of a Hazardous Material originating or emanating from any

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other real property, where any of the foregoing could result in the imposition of any liability on or any restrictions on the operations of any Credit Party with respect to Oil and Gas Properties constituting a material portion of the Borrowing Base pursuant to Environmental Laws.

(f) neither the Borrower nor any of the Restricted Subsidiaries has received any written notice asserting an alleged liability or obligation under any applicable Environmental Laws with respect to the investigation, remediation, abatement, removal, or monitoring of any Hazardous Materials at, under, or Released or threatened to be Released from any real properties offsite the Borrower’s or any of the Restricted Subsidiaries’ Properties and, to the Borrower’s knowledge, there are no conditions or circumstances that could reasonably be expected to result in the receipt of such written notice.

(g) to the Borrower’s knowledge, there has been no exposure of any Person or Property to any Hazardous Materials as a result of or in connection with the operations and businesses of the Borrower’s or any of the Restricted Subsidiaries’ Properties that could reasonably be expected to form the basis for a claim for damages or compensation.

(h) the Borrower and the Restricted Subsidiaries have made available to the Lenders complete and correct copies of all current environmental site assessment reports, investigations, studies, analyses, and correspondence on environmental matters (including matters relating to any alleged non-compliance with or liability under Environmental Laws) that are in any of the Credit Party’s possession or control and relating to their respective Properties or operations thereon.

Section 7.07 Compliance with Laws; No Default.

(a) Each of the Borrower and the Restricted Subsidiaries is in compliance with all Governmental Requirements applicable to it or its Property and all agreements and other instruments binding upon it or its Property, except where the failure to be in compliance, individually or in the aggregate, could not reasonably be expected to result in a Material Adverse Effect.

(b) No Default has occurred and is continuing.

Section 7.08 Investment Company Act. No Credit Party is an “investment company” or a company “controlled” by an “investment company,” within the meaning of, and subject to regulation and registration as such under, the Investment Company Act of 1940, as amended.

Section 7.09 Taxes. Each of the Borrower and the Subsidiaries has timely filed or caused to be filed all Tax returns required to have been filed and has paid or caused to be paid all Taxes required to have been paid by it, except (a) Taxes or the filing of returns that are being contested in good faith by appropriate proceedings and for which the Borrower, such Restricted Subsidiary or such Unrestricted Subsidiary, as applicable, has set aside on its books adequate reserves in accordance with GAAP or (b) to the extent that the failure to do so could not reasonably be expected to result in a Material Adverse Effect; provided that, in the case of Taxes or Tax returns of any Unrestricted Subsidiary, this representation and warranty shall only apply to those Taxes (and returns with respect to such Taxes) for which the Borrower or any of the Restricted Subsidiaries could be held liable by the Governmental Authority that assessed such

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Taxes. The charges, accruals and reserves on the books of the Borrower and its Subsidiaries in respect of Taxes are, in the reasonable opinion of the Borrower, adequate in all material respects. No Tax Lien has been filed against any Property of the Borrower or any Subsidiary that would reasonably be expected to have a Material Adverse Effect and, to the knowledge of the Borrower, no claim is being asserted with respect to any Tax that, if unpaid, would reasonably be expected to have a Material Adverse Effect.

Section 7.10 ERISA. Except to the extent noncompliance could not reasonably be expected to have a Material Adverse Effect:

(a) The Borrower, the Restricted Subsidiaries and each ERISA Affiliate have complied in all material respects with ERISA and, where applicable, the Code regarding each Plan.

(b) Each Plan is, and has been, established and maintained in substantial compliance with its terms, ERISA and, where applicable, the Code.

(c) No act, omission or transaction with respect to any Plan has occurred which could result in imposition on any Credit Party or any ERISA Affiliate (whether directly or indirectly) of (i) either a civil penalty assessed pursuant to subsections (c), (i), (l) or (m) of section 502 of ERISA or a tax imposed pursuant to Chapter 43 of Subtitle D of the Code or (ii) breach of fiduciary duty liability damages under section 409 of ERISA.

(d) Full payment when due has been made of all amounts which the Borrower, any Restricted Subsidiary or any ERISA Affiliate is required under the terms of each Plan or applicable law to have paid as contributions to such Plan as of the date hereof.

(e) Except as set forth on Schedule 7.10(e), neither the Borrower nor any Restricted Subsidiary nor any ERISA Affiliate sponsors, maintains, or contributes to an employee welfare benefit plan, as defined in section 3(1) of ERISA, including, without limitation, any such plan maintained to provide benefits to former employees of such entities, that may not be terminated by the Borrower, any Restricted Subsidiary or any ERISA Affiliate in its sole discretion at any time without any material liability.

(f) Neither the Borrower nor any Restricted Subsidiary nor any ERISA Affiliate sponsors, maintains or contributes to, or has at any time in the six-year period preceding the date hereof sponsored, maintained or contributed to, any employee pension benefit plan, as defined in section 3(2) of ERISA, that is subject to Title IV of ERISA, section 302 of ERISA or section 412 of the Code.

Section 7.11 Disclosure; No Material Misstatements. None of the financial statements, certificates, reports or other written information (other than Reserve Reports and any information delivered in connection therewith) furnished by or on behalf of the Borrower or any Restricted Subsidiary to the Arranger, the Administrative Agent or any Lender pursuant to this Agreement or any other Loan Document or delivered by the Borrower or any Restricted Subsidiary to the Administrative Agent or any Lender hereunder or under any other Loan Document (as modified or supplemented by other information so furnished) contains any material misstatement of fact or omits to state any material fact necessary to make the statements therein, in the light of the

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circumstances under which they were made, not materially misleading on the date when furnished; provided that with respect to financial estimates, projected or forecasted financial information and other forward-looking information, the Borrower represents and warrants only that such information was prepared in good faith based upon assumptions believed to be reasonable at the time of preparation; it being understood that (1) such projections and forecasts, as to future events, are not to be viewed as facts, that actual results during the period(s) covered by any such projections or forecasts may differ significantly from the projected or forecasted results and that such differences may be material and that such projections and forecasts are not a guarantee of financial performance, and (2) no representation is made with respect to information of a general economic or general industry nature. There are no statements or conclusions in any Reserve Report or in any information delivered in connection therewith which are based upon or include materially misleading information of a material fact or fail to take into account material information regarding the material matters reported therein, it being understood that projections concerning volumes attributable to the Oil and Gas Properties of the Borrower and the Restricted Subsidiaries and production and cost estimates contained in each Reserve Report and in other information delivered in connection therewith are necessarily based upon professional opinions, estimates and projections and that no warranty is made with respect to such opinions, estimates and projections.

Section 7.12 Insurance. Each of the Borrower and the Restricted Subsidiaries has (a) all insurance policies sufficient for the compliance in all material aspects by each of them with all material Governmental Requirements and all material agreements to which the Borrower or such Restricted Subsidiary is a party and (b) insurance coverage in at least the amounts and against such risk (including, without limitation, public liability) that are usually insured against by companies similarly situated and engaged in the same or a similar business for the assets and operations of the Borrower and the Restricted Subsidiaries. The Administrative Agent and the Lenders have been named as additional insureds in respect of such liability insurance policies and the Administrative Agent has been named as loss payee with respect to Property loss insurance.

Section 7.13 Restriction on Liens. Except as permitted under Section 9.14, neither the Borrower nor any Restricted Subsidiary is a party to any material agreement or arrangement or is subject to any order, judgment, writ or decree, which either prohibits or purports to prohibit it from granting Liens to the Administrative Agent and the Lenders on or in respect of its Properties to secure the Obligations.

Section 7.14 Subsidiaries. All of the Subsidiaries are set forth on Schedule 7.14 or have been disclosed in writing to the Administrative Agent (which shall promptly furnish a copy to the Lenders) as a supplement to Schedule 7.14. Schedule 7.14, as supplemented from time to time, identifies each Subsidiary as either Restricted or Unrestricted, and each Restricted Subsidiary on such schedule is a Wholly-Owned Subsidiary.

Section 7.15 Location of Business and Offices. The Borrower’s jurisdiction of organization is Texas; the name of the Borrower as listed in the public records of its jurisdiction of organization is Carrizo Oil & Gas, Inc.; and the organizational identification number of the Borrower in its jurisdiction of organization is 0128552700. The Borrower’s principal place of business and chief executive offices are located at the address specified in Section 12.01 (or as

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set forth in a notice delivered in accordance with Section 12.01(c)). Each Restricted Subsidiary’s jurisdiction of organization, name as listed in the public records of its jurisdiction of organization, organizational identification number in its jurisdiction of organization, and the location of its principal place of business and chief executive office is stated on Schedule 7.15 (or as set forth in a notice delivered pursuant to Section 8.01(k) in accordance with Section 12.01).

Section 7.16 Properties; Titles, Etc.

(a) Each of the Borrower and the Restricted Subsidiaries has good and defensible title to the Oil and Gas Properties evaluated in the most recently delivered Reserve Report (other than those disposed of in compliance with Section 9.11 since delivery of such Reserve Report and those title defects disclosed in writing to the Administrative Agent), and good title to all its personal Properties, in each case, free and clear of all Liens other than (i) in the case of Properties other than Oil and Gas Properties, Liens permitted by Section 9.03 and (ii) in the case of Oil and Gas Properties, Liens permitted by the terms of Section 9.03 to exist on Oil and Gas Properties. After giving full effect to the Liens permitted by Section 9.03, the Borrower or the Restricted Subsidiary specified as the owner owns the net interests in production attributable to the Hydrocarbon Interests as reflected in the most recently delivered Reserve Report and Exhibit A to any mortgage or deed of trust (including those delivered on the Effective Date), in each case as of the date delivered, and, except as described in such Reserve Report or such Exhibit A, in each case as of the date delivered, the ownership of such Properties shall not in any material respect obligate the Borrower or such Restricted Subsidiary to bear the costs and expenses relating to the maintenance, development and operations of each such Property in an amount in excess of the working interest of each Property set forth in such Reserve Report or such Exhibit A that is not offset by a corresponding proportionate increase in the Borrower’s or such Restricted Subsidiary’s net revenue interest in such Property.

(b) All material leases and agreements necessary for the conduct of the business of the Borrower and the Restricted Subsidiaries are valid and subsisting and in full force and effect, except to the extent any failure to be valid and subsisting and in full force and effect could not reasonably be expected to have a Material Adverse Effect, and there exists no default, or event or circumstance which with the giving of notice or the passage of time or both would give rise to a default, under any such lease or agreement which could reasonably be expected to have a Material Adverse Effect.

(c) The rights and Properties presently owned, leased or licensed by the Borrower and the Restricted Subsidiaries including all easements and rights of way, include all rights and Properties reasonably necessary to permit the Borrower and the Credit Parties to conduct their business, except to the extent any failure to satisfy the foregoing could not reasonably be expected to have a Material Adverse Effect.

(d) All of the Properties of the Borrower and the Restricted Subsidiaries (other than the Oil and Gas Properties, which are addressed in Section 7.17) which are reasonably necessary for the operation of their businesses are in good working condition and are maintained in accordance with prudent business standards, except to the extent any failure to satisfy the foregoing could not reasonably be expected to have a Material Adverse Effect.

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(e) Each of the Borrower and the Restricted Subsidiaries owns, or is licensed to use, all trademarks, trade names, copyrights, patents and other intellectual Property material to its business, and the use thereof by each such Person does not infringe upon the rights of any other Person, except for any such infringements that, individually or in the aggregate, could not reasonably be expected to result in a Material Adverse Effect. The Borrower and the Restricted Subsidiaries either own or have valid licenses or other rights to use all databases, geological data, geophysical data, engineering data, seismic data, maps, interpretations and other technical information used in and material to their businesses, subject to the limitations contained in the agreements governing the use of the same, which limitations are customary for companies engaged in the business of the exploration and production of Hydrocarbons, with such exceptions as could not reasonably be expected to have a Material Adverse Effect.

Section 7.17 Maintenance of Properties. Except for such acts or failures to act as could not be reasonably expected to have a Material Adverse Effect, the Oil and Gas Properties (and Properties unitized therewith) of the Borrower and the Restricted Subsidiaries have been maintained, operated and developed in a good and workmanlike manner and in conformity with all Governmental Requirements and in conformity with the provisions of all leases, subleases or other contracts comprising a part of the Hydrocarbon Interests and other contracts and agreements forming a part of the Oil and Gas Properties of the Borrower and the Restricted Subsidiaries. Specifically in connection with the foregoing, except for those as could not be reasonably expected to have a Material Adverse Effect, (i) no Oil and Gas Property of the Borrower or any Restricted Subsidiary is subject to having allowable production reduced below the full and regular allowable (including the maximum permissible tolerance) because of any overproduction (whether or not the same was permissible at the time) and (ii) none of the xxxxx comprising a part of the Oil and Gas Properties (or Properties unitized therewith) of the Borrower and the Restricted Subsidiaries is deviated from the vertical more than the maximum permitted by Governmental Requirements, and such xxxxx are, in fact, bottomed under and are producing from, and the well bores are wholly within, the Oil and Gas Properties (or in the case of xxxxx located on Properties unitized therewith, such unitized Properties) of the Borrower and the Restricted Subsidiaries. All pipelines, xxxxx, gas processing plants, platforms and other material improvements, fixtures and equipment owned in whole or in part by the Borrower or any Restricted Subsidiary that are necessary to conduct normal operations are being maintained in a state adequate to conduct normal operations, and with respect to such of the foregoing which are operated by the Borrower or any Restricted Subsidiary, in a manner consistent with the past practices of the Borrower and the Restricted Subsidiaries (other than those the failure of which to maintain in accordance with this Section 7.17 could not reasonably be expected to have a Material Adverse Effect).

Section 7.18 Gas Imbalances, Prepayments. Except as set forth on Schedule 7.18 or included in the most recently delivered Reserve Report Certificate delivered pursuant to Section 8.11(c) or as disclosed in writing to the Administrative Agent, on a net basis there are no gas imbalances, take or pay or other prepayments which would require the Borrower or any Restricted Subsidiary to deliver Hydrocarbons produced from the Oil and Gas Properties of the Borrower and the Restricted Subsidiaries at some future time without then or thereafter receiving full payment therefor exceeding a volume equal to one-half Bcf of gas (on an Mcf equivalent basis) in the aggregate.

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Section 7.19 Marketing of Production. As of the date hereof and as of the date of delivery of each Reserve Report, except for contracts listed and in effect on the date hereof on Schedule 7.19, and thereafter either disclosed in writing to the Administrative Agent or in the most recently delivered Reserve Report Certificate (with respect to each of which contracts the Borrower represents that it or the Restricted Subsidiary party thereto is receiving a price for all production sold thereunder which is computed substantially in accordance with the terms of such contract and is not having deliveries curtailed substantially below the delivery capacity of the subject Property or Properties), no material agreements exist (which are not cancelable on 60 days notice or less without penalty or detriment) for the sale of production from Oil and Gas Properties of the Borrower and the Restricted Subsidiaries (including, without limitation, calls on, or other rights to purchase, production, whether or not the same are currently being exercised) that (a) pertain to the sale of production at a fixed price and (b) have a maturity or expiry date of longer than six (6) months from the date hereof or the date of delivery of such Reserve Report, as applicable.

Section 7.20 Hedge Agreements. Schedule 7.20, as of the date hereof, and after the date hereof, each report required to be delivered by the Borrower pursuant to Section 8.01(d), sets forth a true and complete list of all Hedge Agreements of the Borrower and each Restricted Subsidiary, the material terms thereof (including the type, term, effective date, termination date and notional amounts or volumes), the net xxxx to market value thereof (as of the last Business Day of the most recent month preceding such date of delivery for which a xxxx to market value is reasonably available), all credit support agreements relating thereto (including any margin required or supplied) and the counterparty to each such agreement.

Section 7.21 Use of Loans and Letters of Credit. The proceeds of the Loans and the Letters of Credit shall be used to refinance amounts outstanding under the Existing Credit Agreement, pay fees, expenses, and transaction costs in connection with this Agreement, for working capital, and for general corporate purposes. Neither the Borrower nor any Restricted Subsidiary is engaged principally, or as one of its important activities, in the business of extending credit for the purpose, whether immediate, incidental or ultimate, of buying or carrying margin stock (within the meaning of Regulation T, U or X of the Board). No part of the proceeds of any Loan or Letter of Credit will be used for any purpose which violates the provisions of Regulations T, U or X of the Board.

Section 7.22 Solvency. Immediately after giving effect to the transactions contemplated hereby, (a) the aggregate assets (after giving effect to amounts that could reasonably be received by reason of indemnity, offset, insurance or any similar arrangement), at a fair valuation, of the Credit Parties, taken as a whole, will exceed the aggregate Debt of the Credit Parties on a consolidated basis, as such Debt becomes absolute and matures, (b) no Credit Party will have incurred, has intended to incur or believes that it will incur, Debt beyond its ability to pay such Debt (after taking into account the timing and amounts of cash to be received by it and the amounts to be payable on or in respect of its liabilities, and giving effect to amounts that could reasonably be received by reason of indemnity, offset, insurance or any similar arrangement) as such Debt becomes absolute and matures and (c) no Credit Party will have (and will have no reason to believe that it will have thereafter) unreasonably small capital for the conduct of its business.

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ARTICLE VIII

Affirmative Covenants

Until the Commitments have expired or been terminated and the principal of and interest on each Loan and all fees payable hereunder and all other amounts payable under the Loan Documents shall have been paid in full (other than indemnities and other contingent obligations not then due and payable and as to which no claim has been made as of the time of determination) and all Letters of Credit shall have expired or terminated and all LC Disbursements shall have been reimbursed, the Borrower covenants and agrees with the Lenders that:

Section 8.01 Financial Statements; Other Information. The Borrower will furnish to the Administrative Agent:

(a) Annual Financial Statements. As soon as available, but in any event in accordance with then applicable law and not later than 90 days after the end of each fiscal year of the Borrower, its audited consolidated balance sheet and related statements of operations, stockholders’ equity and cash flows as of the end of and for such fiscal year, setting forth in each case in comparative form the figures for the previous fiscal year, all reported on by independent public accountants of recognized national standing (without a “going concern” or like qualification or exception and without any qualification or exception as to the scope of such audit) to the effect that such consolidated financial statements present fairly in all material respects the financial condition and results of operations of the Borrower and its Consolidated Subsidiaries on a consolidated basis in accordance with GAAP consistently applied.

(b) Quarterly Financial Statements. As soon as available, but in any event in accordance with then applicable law and not later than 45 days after the end of each of the first three fiscal quarters of each fiscal year of the Borrower, its consolidated balance sheet and related statements of operations and cash flows as of the end of and for such fiscal quarter and the then elapsed portion of the fiscal year, setting forth in each case in comparative form the figures for (or, in the case of the balance sheet, as of the end of) the corresponding period or periods of the previous fiscal year, all certified by one of its Financial Officers as presenting fairly in all material respects the financial condition and results of operations of the Borrower and its Consolidated Subsidiaries on a consolidated basis in accordance with GAAP consistently applied, subject to normal year-end audit adjustments and the absence of footnotes.

(c) Certificate of Financial Officer – Compliance. Concurrently with any delivery of financial statements under Section 8.01(a) or Section 8.01(b), a certificate of a Financial Officer in substantially the form of Exhibit D hereto (i) certifying as to whether a Default has occurred and is continuing as of the date of such certificate and, if a Default has occurred and is continuing, specifying the details thereof and any action taken or proposed to be taken with respect thereto, (ii) setting forth reasonably detailed calculations demonstrating compliance with Section 9.01 and (iii) with the delivery of the financial statements under Section 8.01(a) only, stating whether any change in GAAP or in the application thereof has occurred since December 31, 2009 which materially changes the calculation of any covenant or affects compliance with the terms of this Agreement and, if applicable, specifying the effect of such change on the financial statements accompanying such certificate.

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(d) Certificate of Financial Officer – Hedge Agreements. Concurrently with any delivery of financial statements under Section 8.01(a) and Section 8.01(b), a certificate of a Financial Officer, in form and substance reasonably satisfactory to the Administrative Agent, setting forth as of the last day of such fiscal quarter or fiscal year, a true and complete list of all Hedge Agreements of the Borrower and the Restricted Subsidiaries, the material terms thereof (including the type, term, effective date, termination date and notional amounts or volumes), the net xxxx-to-market value thereof (as of the last day of such fiscal quarter or fiscal year), any new credit support agreements relating thereto not listed on Schedule 7.20, any margin required or supplied under any credit support agreement, and the counterparty to each such Hedge Agreement.

(e) Certificate of Insurer – Insurance Coverage. Concurrently with any delivery of financial statements under Section 8.01(a), if requested by the Administrative Agent, a certificate of insurance coverage from each insurer with respect to the insurance required by Section 8.06, in form and substance satisfactory to the Administrative Agent, and, if requested by the Administrative Agent or any Lender, copies of the applicable policies.

(f) SEC and Other Filings; Reports to Shareholders. Promptly after the same become publicly available, copies of all annual, regular, periodic and special reports and registration and proxy statements filed by the Borrower or any Restricted Subsidiary with the SEC or with any national securities exchange.

(g) Notices Under Material Instruments. Promptly after receipt, (i) a copy of any notice of default received from any holder or holders of any Senior Notes or any trustee or agent on its or their behalf, to the extent such notice has not otherwise been delivered to the Administrative Agent hereunder and (ii) a copy of any notice or report given to or received from the lenders or any agent or representative on their behalf under the Carrizo UK Facility specifically related to the Borrower’s guaranty obligations thereunder, including any reports or notices relating to cost overruns.

(h) Lists of Purchasers. In connection with the delivery of any Reserve Report to the Administrative Agent pursuant to Section 8.11, a list of (i) the purchasers that accounted for at least 75% of the aggregate volume of Hydrocarbons purchased from the Borrower and the Restricted Subsidiaries in the six-month period prior to the “as of” date of such Reserve Report (in descending order based on volumes purchased) and (ii) to the extent not included in the group of purchasers described in clause (i), each purchaser that accounted for at least 10% of the aggregate volume of Hydrocarbons purchased from the Borrower and the Restricted Subsidiaries in such six-month period.

(i) Notice of Sales of Oil and Gas Properties. In the event the Borrower or any Restricted Subsidiary intends to sell, transfer, assign or otherwise dispose of any Oil or Gas Properties or any Equity Interests in any Restricted Subsidiary owning Oil and Gas Properties in accordance with Section 9.11 (other than pursuant to Section 9.11(a)) in a transaction involving consideration in excess of two percent (2%) of the then effective Borrowing Base, prior written notice of such disposition, the consideration to be received in connection therewith, the anticipated date of closing and any other details thereof reasonably requested by the Administrative Agent or any Lender.

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(j) Issuance of Permitted Additional Senior Notes; Permitted Refinancing Debt. Promptly upon the closing and consummation of the issuance of any Permitted Additional Senior Notes or the refinancing of any Debt with the proceeds of Permitted Refinancing Debt, a true and correct copy of the material documents relating to such Permitted Additional Senior Notes or such Permitted Refinancing Debt.

(k) Information Regarding Borrower and Guarantors. Prompt written notice (and in any event within ten (10) days prior thereto or such later date as may be reasonably acceptable to the Administrative Agent) of any change (i) in the Borrower’s or any Guarantor’s corporate or limited liability company name, (ii) in the location of the Borrower’s or any Guarantor’s chief executive office or principal place of business, (iii) in the Borrower’s or any Guarantor’s identity or corporate structure, (iv) in the Borrower’s or any Guarantor’s jurisdiction of organization or such Person’s organizational identification number in such jurisdiction of organization, and (v) in the Borrower’s or any Guarantor’s federal taxpayer identification number.

(l) Production Report and Lease Operating Statements. Within five Business Days of the delivery of each Reserve Report, a report in form and substance reasonably satisfactory to the Administrative Agent, setting forth, for each calendar month during the period of 12 consecutive calendar months most recently ended prior to the date of such Reserve Report, the volume of production and sales attributable to production (and the prices at which such sales were made and the revenues derived from such sales) for each such calendar month from the Oil and Gas Properties of the Borrower and the Restricted Subsidiaries, and setting forth the related ad valorem, severance and production taxes and lease operating expenses attributable thereto and incurred for each such calendar month.

(m) Certificate of Financial Officer – Consolidating Information. If, at any time, all of the Subsidiaries of the Borrower are not Restricted Subsidiaries, then concurrently with any delivery of financial statements under Section 8.01(a) or Section 8.01(b), a certificate of a Financial Officer setting forth consolidating spreadsheets that show all Unrestricted Subsidiaries and the eliminating entries, in such form as would be presentable to the auditors of the Borrower.

(n) Termination of Hedge Positions. In the event that the Borrower or any Restricted Subsidiary intends to assign, terminate, sell or unwind any hedge position under any Hedge Agreement upon which the Lenders relied in determining the then-effective Borrowing Base, or create any off-setting position (whether evidenced by a floor, put or Hedge Agreement) with respect to any hedge position under any Hedge Agreement upon which the Lenders relied in determining the then-effective Borrowing Base, and the effect of such action, after taking into account the net hedging position under all then outstanding Hedge Agreements of the Borrower and the Restricted Subsidiaries taken as a whole (including any other Hedge Agreements executed contemporaneously with the taking of such action), would be to cancel any of the Borrower’s or any of the Restricted Subsidiaries’ positions under all such Hedging Agreements, prior written notice of such intent not less than two (2) Business Days prior to the proposed date of such action; provided that such notice need only be provided to the extent that, if the value attributed to such cancelled positions for purposes of determining the then-

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effective Borrowing Base were excluded from the Borrowing Base at such time, the Borrowing Base would reasonably be expected to be reduced by an amount in excess of 1% thereof.

(o) Other Requested Information. Promptly following any request therefor, such other information regarding the operations, business affairs and financial condition of the Borrower or any Restricted Subsidiary (including, without limitation, any Plan and any reports or other information required to be filed with respect thereto under the Code or under ERISA), or compliance with the terms of this Agreement or any other Loan Document, as the Administrative Agent or any Lender (acting through the Administrative Agent) may reasonably request.

Documents required to be delivered pursuant to this Section 8.01 or Section 8.11 may be delivered electronically and shall be deemed to have been so delivered on the date (i) on which the Borrower posts such documents, or provides a link thereto, on its website (located on the date hereof at xxx.xxxx.xxx) or (ii) on which such documents are posted on the Borrower’s behalf on the website of the SEC or on IntraLinks or another relevant website, if any, to which each Lender and the Administrative Agent have access (whether a commercial third-party website or whether sponsored by the Administrative Agent); provided that, the Borrower shall notify the Administrative Agent of the posting of any such documents and the Administrative Agent shall in turn give the Lenders notice of such posting; and provided further that, if requested by the Administrative Agent, the Compliance Certificate to be delivered under Section 8.01(c) shall also be delivered in a tangible, physical version or in .pdf format.

Section 8.02 Notices of Material Events. The Borrower will furnish to the Administrative Agent, promptly after a Responsible Officer obtains knowledge thereof, written notice of the following:

(a) the occurrence of any Default;

(b) (i) the filing or commencement of, or the threat in writing of, any action, suit, proceeding, investigation or arbitration by or before any arbitrator or Governmental Authority against the Borrower or any Subsidiary not previously disclosed in writing to the Administrative Agent as to which there is a reasonable possibility of an adverse determination that, if adversely determined, could reasonably be expected to result in a Material Adverse Effect and (ii) any material adverse development in any action, suit, proceeding, investigation or arbitration by or before any arbitrator or Governmental Authority against the Borrower or any Subsidiary (whether or not previously disclosed to the Administrative Agent) that could reasonably be expected to result in a Material Adverse Effect; and

Each notice delivered under this Section 8.02 shall be accompanied by a statement of a Responsible Officer setting forth the details of the event or development requiring such notice and any action taken or proposed to be taken with respect thereto.

Section 8.03 Existence; Conduct of Business. The Borrower will, and will cause each of the Restricted Subsidiaries to, do or cause to be done all things necessary to preserve, renew and keep in full force and effect its legal existence and the rights, licenses, permits, privileges

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and franchises material to the conduct of its business and maintain, if necessary, its qualification to do business in each other jurisdiction in which its Oil and Gas Properties is located or the ownership of its Properties requires such qualification, except where the failure to so satisfy the foregoing requirements could not reasonably be expected to have a Material Adverse Effect; provided that the foregoing shall not prohibit any merger, consolidation, liquidation or dissolution permitted under Section 9.10 or any transaction under Section 9.11.

Section 8.04 Payment of Taxes. The Borrower will, and will cause each Subsidiary to, pay or discharge all Tax liabilities of the Borrower or such Subsidiary, as the case may be, before the same shall become delinquent, except where (a) the validity or amount thereof is being contested in good faith by appropriate proceedings, and the Borrower or such Subsidiary has set aside on its books adequate reserves with respect thereto in accordance with GAAP or (b) the failure to pay or discharge the same could not reasonably be expected to result in a Material Adverse Effect; provided that, in the case of Tax liabilities of any Unrestricted Subsidiary, this covenant shall only apply to those Tax liabilities for which the Borrower or any of the Restricted Subsidiaries could be held liable by the Governmental Authority that assessed the Taxes giving rise to such Tax liabilities.

Section 8.05 Operation and Maintenance of Properties. The Borrower, at its own expense, will, and will cause each of the Restricted Subsidiaries to:

(a) operate its Oil and Gas Properties and other material Properties, or cause such Oil and Gas Properties and other material Properties to be operated, in a careful and efficient manner in accordance with the practices of the industry and in compliance with all applicable contracts and agreements and in compliance with all applicable Governmental Requirements, including, without limitation, applicable proration requirements and Environmental Laws, except, in each case, where the failure to so operate or comply could not reasonably be expected to have a Material Adverse Effect.

(b) except to the extent disposed of pursuant to a transaction permitted by this Agreement, keep and maintain all Property material to the conduct of its business in good working order and condition, ordinary wear and tear excepted.

(c) promptly pay and discharge, or make reasonable and customary efforts to cause to be paid and discharged, all delay rentals, royalties, expenses and indebtedness accruing under the leases or other agreements pertaining to its Oil and Gas Properties and will do all other things necessary to keep unimpaired its rights with respect thereto and prevent any forfeiture thereof or default thereunder except, in each case, where the failure to do so, individually or in the aggregate, could not reasonably be expected to have a Material Adverse Effect.

(d) promptly perform, or make reasonable and customary efforts to cause to be performed, in accordance with industry standards, the obligations required by each and all of the assignments, deeds, leases, sub-leases, contracts and agreements affecting its interests in its Oil and Gas Properties and other material Properties except, in each case, where the failure to do so, individually or in the aggregate, could not reasonably be expected to have a Material Adverse Effect.

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(e) to the extent neither the Borrower nor a Restricted Subsidiary is the operator of any of its Oil and Gas Properties, the Borrower shall use commercially reasonable efforts to cause the operator to comply with this Section 8.05 except where the failure to do so, individually or in the aggregate, could not reasonably be expected to result in a Material Adverse Effect.

Section 8.06 Insurance. The Borrower will, and will cause each of the Restricted Subsidiaries to, maintain, with financially sound and reputable insurance companies, insurance in such amounts and against such risks as are customarily maintained by companies engaged in the same or similar businesses operating in the same or similar locations (provided that this Section 8.06 shall not be breached if an insurance company with which the Borrower or any Restricted Subsidiary maintains insurance becomes financially troubled and the Borrower or such Restricted Subsidiary reasonably promptly obtains coverage from a different, financially sound insurer). The loss payable clauses or provisions in the insurance policy or policies insuring any of the collateral for the Loans shall be endorsed in favor of and made payable to the Administrative Agent as its interests may appear and such policies shall name or otherwise include the Administrative Agent and the Lenders as “additional insureds” and provide that the insurer will endeavor to give at least 30 days prior notice of any cancellation thereof to the Administrative Agent.

Section 8.07 Books and Records; Inspection Rights. The Borrower will, and will cause each of the Restricted Subsidiaries to, keep proper books of record and account in accordance with GAAP. The Borrower will, and will cause each of the Restricted Subsidiaries to, permit any representatives designated by the Administrative Agent (or any Lender, provided that such Lender coordinates its visitation with the Administrative Agent), upon reasonable prior notice and no more often than once in the aggregate for the Administrative Agent or the Lenders, as the case may be, in any period of 12 calendar months (unless an Event of Default has occurred and is continuing, in which case there shall be no limit to the number or frequency of such visitations or inspections while such Event of Default is continuing), to visit and inspect its Properties, to examine and make extracts from its books and records, and to discuss its affairs, finances and condition with its officers and independent accountants, all at such reasonable times and at the expense of the Administrative Agent or the applicable Lender, as applicable; provided, however, that the Borrower will bear the expenses of any such visitation or inspection made while an Event of Default has occurred and is continuing.

Section 8.08 Compliance with Laws. The Borrower will, and will cause each of the Restricted Subsidiaries to, comply with all laws, rules, regulations and orders of any Governmental Authority applicable to it or its Property, except where the failure to do so, individually or in the aggregate, could not reasonably be expected to result in a Material Adverse Effect.

Section 8.09 Environmental Matters.

(a) The Borrower shall at its sole expense: (i) comply, and shall cause its Properties (it being understood that the term “Properties” as used in this Section 8.09 shall not include surface interests owned by Persons other than the Borrower or any Restricted Subsidiary lying over any mineral interests of the Borrower or any Restricted Subsidiary) and

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operations and each Restricted Subsidiary and each Restricted Subsidiary’s Properties and operations to comply, with all applicable Environmental Laws, the breach of which could be reasonably expected to have a Material Adverse Effect; (ii) not Release or threaten to Release, and shall cause each Restricted Subsidiary not to Release or threaten to Release, any Hazardous Material on, under, about or from the Borrower’s or any Restricted Subsidiary’s Properties or any other property offsite the Property to the extent caused by the Borrower’s or any Restricted Subsidiary’s operations except in compliance with applicable Environmental Laws, the Release or threatened Release of which could reasonably be expected to have a Material Adverse Effect; (iii) timely obtain or file, and shall cause each Restricted Subsidiary to timely obtain or file, all Environmental Permits, if any, required under applicable Environmental Laws to be obtained or filed in connection with the operation or use of the Borrower’s or the Restricted Subsidiaries’ Properties, which failure to obtain or file could reasonably be expected to have a Material Adverse Effect; (iv) promptly commence and diligently prosecute to completion, and shall cause each Restricted Subsidiary to promptly commence and diligently prosecute to completion, any assessment, evaluation, investigation, monitoring, containment, cleanup, removal, repair, restoration, remediation or other remedial obligations (collectively, the “Remedial Work”) in the event any Remedial Work is required or reasonably necessary under applicable Environmental Laws because of or in connection with the actual or suspected past, present or future Release or threatened Release of any Hazardous Material on, under, about or from the Borrower’s or any Restricted Subsidiary’s Properties, which failure to commence and diligently prosecute to completion could reasonably be expected to have a Material Adverse Effect; (v) conduct, and cause its Restricted Subsidiaries to conduct, their respective operations and businesses in a manner that will not expose any Property or Person to Hazardous Materials that could reasonably be expected to form the basis for a claim for damages or compensation that could reasonably be expected to have a Material Adverse Effect; and (vi) establish and implement, and shall cause each Restricted Subsidiary to establish and implement, such procedures as may be necessary to continuously determine and assure that the Borrower’s and such Restricted Subsidiary’s obligations under this Section 8.09 (a) are timely and fully satisfied, except to the extent that the failure to so establish and implement could not reasonably be expected to have a Material Adverse Effect.

(b) In the event that a Responsible Officer of the Borrower obtains knowledge of any threatened (in writing) action, investigation or inquiry by any Governmental Authority or any threatened (in writing) demand or lawsuit by any Person against the Borrower or any Restricted Subsidiary or its Properties in connection with any Environmental Laws which (individually or in the aggregate with all other such actions then in existence) could reasonably be expected to have a Material Adverse Effect, the Borrower will notify the Administrative Agent in writing of such action promptly, but in no event later than ten Business Days, after the later of (i) a Responsible Officer obtaining knowledge thereof and (ii) a Responsible Officer determining that such action (individually or in the aggregate with all other such actions then in existence) could reasonably be expected to have a Material Adverse Effect).

(c) Upon request by the Administrative Agent and no more than once per year in the absence of any Event of Default (or as otherwise required to be obtained by the Administrative Agent by any Governmental Authority), the Borrower will, and will cause each Restricted Subsidiary to, provide environmental assessments, audits and tests in accordance

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with the most current version of the American Society of Testing Materials standards in connection with any future acquisitions of Oil and Gas Properties or other Properties.

Section 8.10 Further Assurances.

(a) The Borrower at its sole expense will, and will cause each other Credit Party to, promptly execute and deliver to the Administrative Agent all such other documents, agreements and instruments reasonably requested by the Administrative Agent to comply with, cure any defects (in regards to errors and mistakes) in, or accomplish the conditions precedent, covenants and agreements of the Borrower or any other Credit Party, as the case may be, in the Loan Documents, including the Notes, or to further evidence and more fully describe the collateral intended as security for the Obligations, or to perfect, protect or preserve any Liens created pursuant to this Agreement or any of the Security Instruments or the priority thereof, or to make any recordings, file any notices or obtain any consents, all as may be reasonably necessary or appropriate in connection therewith.

(b) The Borrower hereby authorizes the Administrative Agent to file one or more financing or continuation statements, and amendments thereto, relative to all or any part of the Mortgaged Property without the signature of the Borrower or any other Credit Party where permitted by law. A carbon, photographic or other reproduction of the Security Instruments or any financing statement covering the Mortgaged Property or any part thereof shall be sufficient as a financing statement where permitted by law.

Section 8.11 Reserve Reports.

(a) On or before April 1st and October 1st of each year, commencing April 1, 2011, the Borrower shall furnish to the Administrative Agent a Reserve Report evaluating the proved Oil and Gas Properties of the Borrower and its Domestic Subsidiaries as of the immediately preceding January 1st and July 1st located within the geographic boundaries of the United States of America (or the Outer Continental Shelf adjacent to the United States of America). The Reserve Report as of January 1 of each year shall be prepared by one or more Approved Petroleum Engineers, and the July 1 Reserve Report of each year shall be prepared by the Borrower, which shall certify such Reserve Report to be true and accurate and to have been prepared, except as otherwise specified therein, in accordance with the procedures used in the immediately preceding January 1 Reserve Report.

(b) In the event of an Interim Redetermination, the Borrower shall furnish to the Administrative Agent a Reserve Report prepared by the Borrower, which shall certify such Reserve Report to be true and accurate and to have been prepared, except as otherwise specified therein, in accordance with the procedures used in the immediately preceding January 1 Reserve Report. For any Interim Redetermination requested by the Administrative Agent or the Borrower pursuant to Section 2.07(b), the Borrower shall provide such Reserve Report with an “as of” date as required by the Administrative Agent as soon as possible, but in any event no later than thirty (30) days following the receipt of such request.

(c) With the delivery of each Reserve Report, the Borrower shall provide to the Administrative Agent a Reserve Report Certificate from a Responsible Officer certifying

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that: (i) there are no statements or conclusions in any Reserve Report or in any information delivered in connection therewith which are based upon or include materially misleading information of a material fact or fail to take into account material information regarding the material matters reported therein (it being understood that projections concerning volumes attributable to the Oil and Gas Properties of the Borrower and the Restricted Subsidiaries and production and cost estimates contained in such Reserve Report and in other information delivered in connection therewith are necessarily based upon professional opinions, estimates and projections and that no warranty is made with respect to such opinions, estimates and projections), (ii) except as set forth in an exhibit to such certificate, the Borrower or any of the Restricted Subsidiaries owns good and defensible title to the Oil and Gas Properties evaluated in such Reserve Report and such Properties are free of all Liens except for Liens permitted by Section 9.03, (iii) except as set forth on an exhibit to such certificate, on a net basis there are no gas imbalances, take or pay or other prepayments in excess of the volume specified in Section 7.18 with respect to the Oil and Gas Properties of the Borrower and the Restricted Subsidiaries evaluated in such Reserve Report which would require the Borrower or any Restricted Subsidiary to deliver Hydrocarbons either generally or produced from such Oil and Gas Properties at some future time without then or thereafter receiving full payment therefor, (iv) none of the Oil and Gas Properties of the Borrower and the Restricted Subsidiaries evaluated in the immediately preceding Reserve Report have been sold since the date of the last Borrowing Base determination except as set forth on an exhibit to the certificate, which certificate shall list all such Oil and Gas Properties that have been so sold and in such detail as reasonably required by the Administrative Agent, (v) attached to such certificate is a list of all marketing agreements entered into subsequent to the later of the date hereof or the most recently delivered Reserve Report Certificate which the Borrower could reasonably be expected to have been obligated to list on Schedule 7.19 had such agreement been in effect on the date hereof and (vi) attached thereto is a schedule of the Oil and Gas Properties evaluated by such Reserve Report that are Mortgaged Properties and demonstrating the percentage of the total value of the Oil and Gas Properties that the value of such Mortgaged Properties represent.

Section 8.12 Title Information.

(a) Within 30 days after the delivery to the Administrative Agent of each Reserve Report required by Section 8.11(a) (or such later date as may be acceptable to the Administrative Agent), the Borrower will deliver title information in form and substance reasonably acceptable to the Administrative Agent (it being understood that title information with respect to Oil and Gas Properties of the Borrower and the Restricted Subsidiaries located in the Xxxxxxx Shale prepared in accordance with the Title Policies and Procedures shall be acceptable to the Administrative Agent) covering enough of the Oil and Gas Properties evaluated by such Reserve Report that were not included in the immediately preceding Reserve Report so that the Administrative Agent shall have received, together with title information previously delivered to the Administrative Agent, satisfactory title information on at least 75% of the total value of the Oil and Gas Properties evaluated by such Reserve Report.

(b) If title information for additional Properties has been provided under Section 8.12(a), the Borrower shall, within 60 days of notice from the Administrative Agent that title defects or exceptions exist with respect to such additional Properties that are not permitted by Section 9.03, either (i) cure any such title defects or exceptions (including defects

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or exceptions as to priority), (ii) substitute acceptable Mortgaged Properties with no title defects or exceptions (other than Liens which are permitted by Section 9.03) having an equivalent value or (iii) deliver title information in form and substance reasonably acceptable to the Administrative Agent (it being understood that title information with respect to Oil and Gas Properties of the Borrower and the Restricted Subsidiaries located in the Xxxxxxx Shale prepared in accordance with the Borrower’s title policies and procedures shall be acceptable to the Administrative Agent) so that the Administrative Agent shall have received, together with title information previously delivered to the Administrative Agent, satisfactory title information on at least 75% of the value of the Oil and Gas Properties evaluated by such Reserve Report.

(c) If any title defect or exception identified by the Administrative Agent pursuant to a notice to the Borrower as described in Section 8.12(b) cannot be cured or the Borrower does not substitute acceptable Mortgaged Properties or the Borrower does not comply with the requirement to provide acceptable title information covering 75% of the value of the Oil and Gas Properties evaluated in the most recent Reserve Report, in each case within the 60-day period described in Section 8.12(b), such default shall not be a Default, but instead the Administrative Agent and/or the Required Lenders shall have the right to exercise the remedy described in the immediately succeeding sentence in their sole discretion from time to time, and any failure to so exercise such remedy at any time shall not be a waiver as to any future exercise of such remedy by the Administrative Agent or the Lenders. To the extent that the Administrative Agent or the Required Lenders are not satisfied with title to any Mortgaged Property after the 60-day period described in Section 8.12(b) has elapsed, such Mortgaged Property shall not count towards the 75% title requirement and shall be deemed not to have been included in the most recently delivered Reserve Report, and the Administrative Agent may send a notice to the Borrower and the Lenders that the then outstanding Borrowing Base shall be reduced by an amount as determined by the Required Lenders to cause the Borrower to be in compliance with the requirement to provide satisfactory title information on 75% of the value of the Oil and Gas Properties evaluated by the most recently delivered Reserve Report. This new Borrowing Base shall become effective immediately after receipt of such notice.

For purposes of this Section 8.12, it is understood and agreed that title information with respect to Oil and Gas Properties of the Borrower and the Restricted Subsidiaries located in the Xxxxxxx Shale shall be deemed satisfactory if such title information meets the qualifications described in the Title Policies and Procedures for establishment of satisfactory title such that no additional curative actions need be taken pursuant to the requirements set forth in the Title Policies and Procedures.

Section 8.13 Additional Collateral; Additional Guarantors.

(a) In connection with each redetermination of the Borrowing Base, the Borrower shall review the Reserve Report delivered in connection therewith and the list of current Mortgaged Properties (as described in Section 8.11(c)(vi)) to ascertain whether the Mortgaged Properties represent at least 80% of the total value of the Oil and Gas Properties evaluated in such Reserve Report. In the event that the Mortgaged Properties do not represent at least 80% of such total value, then the Borrower shall, and shall cause its Restricted Subsidiaries to, grant, within thirty (30) days of delivery of the certificate required under Section 8.11(c), to the Administrative Agent as security for the Obligations a first-priority Lien

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interest (provided that Liens which are permitted by the terms of Section 9.03 to attach to the Mortgaged Properties may exist and have whatever priority such Liens have at such time under applicable law) on additional Oil and Gas Properties not already subject to a Lien of the Security Instruments such that after giving effect thereto, the Mortgaged Properties will represent at least 80% of such total value. All such Liens will be created and perfected by and in accordance with the provisions of deeds of trust, security agreements and financing statements or other Security Instruments, all in form and substance reasonably satisfactory to the Administrative Agent and in sufficient executed (and acknowledged where necessary or appropriate) counterparts for recording purposes. In order to comply with the foregoing, if any Restricted Subsidiary places a Lien on its Oil and Gas Properties and such Subsidiary is not a Guarantor, then it shall become a Guarantor and comply with Section 8.13(b).

(b) If (i) the Borrower shall form or acquire a Material Domestic Subsidiary or otherwise determines that any Restricted Subsidiary is a Material Domestic Subsidiary, (ii) the Borrower elects to have a Domestic Subsidiary guarantee the Obligations or (iii) a Domestic Subsidiary incurs or guarantees any Debt for borrowed money in excess of $500,000, then the Borrower shall promptly cause such Subsidiary to guarantee the Obligations pursuant to the Guaranty Agreement. In connection with any such guaranty, the Borrower shall, or shall cause the relevant Subsidiary, if applicable, to, (A) execute and deliver a supplement to the Guaranty Agreement executed by such Subsidiary, (B) pledge all of the Equity Interests of such new Domestic Subsidiary (including, without limitation, delivery of original stock certificates, if any, evidencing the Equity Interests of such Subsidiary, together with an appropriate undated stock power for each certificate duly executed in blank by the registered owner thereof) and (C) execute and deliver such other additional closing documents, certificates and legal opinions as shall reasonably be requested by the Administrative Agent in connection therewith.

(c) In the event that the Borrower or any Domestic Subsidiary becomes the direct owner of a Foreign Subsidiary which would qualify as a Material Domestic Subsidiary if it were a Domestic Subsidiary, then (i) in the case of a Domestic Subsidiary becoming the direct owner, the Borrower shall cause such Domestic Subsidiary to promptly guarantee the Obligations pursuant to the Guaranty Agreement by executing and delivering a supplement to the Guaranty Agreement, (ii) the Borrower shall, or shall cause such Domestic Subsidiary to, pledge sixty six and two-thirds percent (66-2/3%) of all the Equity Interests of such Foreign Subsidiary (including, without limitation, delivery of original stock certificates evidencing such Equity Interests of such Foreign Subsidiary, if any, together with appropriate stock powers for each certificate duly executed in blank by the registered owner thereof) and (iii) the Borrower shall, or shall cause such Domestic Subsidiary to, execute and deliver such other additional closing documents, certificates and legal opinions as shall reasonably be requested by the Administrative Agent in connection therewith.

Section 8.14 ERISA Compliance. The Borrower will promptly furnish, and will cause the Restricted Subsidiaries and any ERISA Affiliate to promptly furnish, to the Administrative Agent upon its request (i) promptly after the filing thereof with the United States Secretary of Labor or the Internal Revenue Service, copies of each annual and other material report with respect to each Plan or any trust created thereunder, and (ii) within five (5) Business Days after becoming aware of the occurrence of any material “prohibited transaction,” as described in

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section 406 of ERISA or in section 4975 of the Code, in connection with any Plan or any trust created thereunder, a written notice signed by a Responsible Officer of the Borrower, the applicable Restricted Subsidiary or the applicable ERISA Affiliate, as the case may be, specifying the nature thereof, what action such Person is taking or proposes to take with respect thereto, and, when known, any action taken or proposed by the Internal Revenue Service or the Department of Labor with respect thereto.

Section 8.15 Marketing Activities. The Borrower will not, and will not permit any Credit Party to, engage in marketing activities for any Hydrocarbons or enter into any contracts related thereto other than (i) contracts for the sale of Hydrocarbons scheduled or reasonably estimated to be produced from their proved Oil and Gas Properties during the period of such contract, (ii) contracts for the sale of Hydrocarbons scheduled or reasonably estimated to be produced from proved Oil and Gas Properties of third parties during the period of such contract associated with the Oil and Gas Properties of the Borrower and the Credit Parties that the Borrower or one of its Subsidiaries has the right to market pursuant to joint operating agreements, unitization agreements or other similar contracts that are usual and customary in the oil and gas business and (iii) other contracts for the purchase and/or sale of Hydrocarbons of third parties (A) to the extent the aggregate amount owed by the Borrower and its Restricted Subsidiaries under all such contracts described in this clause (iii) does not exceed an amount equal to 1% of the then-effective Borrowing Base or (B) which have generally offsetting provisions (i.e. corresponding pricing mechanics, delivery dates and points and volumes) such that no “position” is taken and (B) for which appropriate credit support has been taken to alleviate the material credit risks of the counterparty thereto.

Section 8.16 Unrestricted Subsidiaries.

(a) The Borrower will cause its management, business and affairs and the management, business and affairs of the Restricted Subsidiaries to be conducted in such a manner (including, without limitation, by keeping separate books of account, furnishing separate financial statements of Unrestricted Subsidiaries to creditors and potential creditors thereof and by not permitting Properties of the Borrower and the Restricted Subsidiaries to be commingled with those of Unrestricted Subsidiaries) so that each Unrestricted Subsidiary that is a corporation will be treated as a corporate entity separate and distinct from each of the Borrower and the Restricted Subsidiaries.

(b) Other than pursuant to the UK Cost Overrun Guarantee and any other Guarantee permitted under Section 9.05(g)(iii) or Section 9.05(q), the Borrower will not, and will not permit any of the Restricted Subsidiaries to, incur, assume, guarantee or be or become liable for any Debt of any of the Unrestricted Subsidiaries.

(c) The Borrower will not permit any Unrestricted Subsidiary to hold any Equity Interest in, or any Debt of, the Borrower or any Restricted Subsidiary.

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ARTICLE IX

Negative Covenants

Until the Commitments have expired or terminated and the principal of and interest on each Loan and all fees payable hereunder and all other amounts payable under the Loan Documents have been paid in full (other than indemnities and other contingent obligations not then due and payable and as to which no claim has been made as of the time of determination) and all Letters of Credit have expired or terminated and all LC Disbursements shall have been reimbursed, the Borrower covenants and agrees with the Lenders that:

Section 9.01 Financial Covenants.

(a) Ratio of Total Debt to EBITDAX. The Borrower will not, as of the last day of any fiscal quarter, permit its ratio of Total Debt as of such date to EBITDAX for the period of four consecutive fiscal quarters ending on such date to be greater than the following:

Fiscal Quarter Ending	Ratio
March 31, 2011 through December 31, 2011	4.75 to 1.00
March 31, 2012 through June 30, 2012	4.25 to 1.00
September 30, 2012 and thereafter	4.00 to 1.00

(b) Current Ratio. The Borrower will not permit, as of the last day of any fiscal quarter, its ratio of (i) consolidated current assets of the Borrower and the Restricted Subsidiaries (including the unused amount of the total Commitments, but excluding non-cash assets under FAS 133) to (ii) consolidated current liabilities of the Borrower and the Restricted Subsidiaries (excluding (x) non-cash obligations under FAS 133, (y) current maturities under this Agreement and (z) the non-cash effects, if any, of any non-cash stock option re-pricing accrual), in each case determined in accordance with GAAP, to be less than 1.00 to 1.00. For purposes of determining the Borrower’s compliance with this Section 9.01(b), the Borrower’s options to acquire mineral interests and leases under agency agreements (x) with independent third parties that are not Affiliates or subsidiaries of any Credit Party or (y) with Affiliates of any Credit Party in connection with joint ventures or other transactions approved by an independent committee of the Borrower’s board of directors will be excluded from the calculation of consolidated current liabilities.

(c) Maximum Senior Debt to EBITDAX. The Borrower will not permit, as of the last day of any fiscal quarter, its ratio of Senior Debt as of such date to EBITDAX for the period of four consecutive fiscal quarters ending on such date to be more than 2.50 to 1.00.

(d) Minimum EBITDAX to Interest Expense. The Borrower will not permit, as of the last day of any fiscal quarter, its ratio of EBITDAX for the period of four consecutive fiscal quarters ending on such date to Interest Expense for the period of four consecutive fiscal quarters ending on such date to be less than 2.50 to 1.00.

Section 9.02 Debt. The Borrower will not, and will not permit any of the Restricted Subsidiaries to, incur, create, assume or suffer to exist any Debt, except:

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(a) the Loans and any other Obligations and any guaranty of or suretyship arrangement in respect thereof.

(b) Debt of the Borrower and the Credit Parties existing on the date hereof that is reflected in the Financial Statements or in Schedule 9.02, including the Existing Senior Notes, and any Permitted Refinancing Debt in respect thereof.

(c) Debt associated with bonds or surety obligations (i) required in connection with self-insurance or the performance of contracts, (ii) required by Governmental Requirements in connection with the operation of the Oil and Gas Properties or (iii) required in connection with the enforcement of rights or claims of the Borrower or any of the Restricted Subsidiaries or in connection with the appeal of judgments that do not result in a Default or an Event of Default.

(d) intercompany Debt between the Borrower and any Restricted Subsidiary or between Restricted Subsidiaries to the extent permitted by Section 9.05(g); provided that such Debt is not held, assigned, transferred, negotiated or pledged to any Person other than the Borrower or any of the Restricted Subsidiaries, and, provided further, that any such Debt for borrowed money owed by a Credit Party to a non-Credit Party shall be subordinated to the Obligations on terms set forth in the Guaranty Agreement.

(e) endorsements of negotiable instruments for collection in the ordinary course of business.

(f) Permitted Additional Senior Notes issued by the Borrower and any guarantees of such Debt by the Borrower or any other Guarantor, provided that (i) at the time of incurring such Debt (A) no Default has occurred and is then continuing and (B) no Default would result from the incurrence of such Debt after giving effect to the incurrence of such Debt (and any concurrent repayment of Debt with the proceeds of such incurrence), (ii) such Debt does not have any scheduled amortization prior to 91 days after the Maturity Date, (iii) such Debt does not mature sooner than 91 days after the Maturity Date, (iv) the covenants applicable to such Debt are not materially more onerous, taken as a whole, than the covenants applicable to the Existing 2018 Notes, (v) the Borrowing Base is reduced pursuant to Section 2.07(e) and prepayment is made to the extent required by Section 3.04(c)(iii), and (vii) the aggregate principal amount of such Permitted Additional Senior Notes does not exceed $400,000,000 at any time; and any Permitted Refinancing Debt in respect thereof.

(g) Debt under Capital Leases and Debt secured by Liens permitted under Section 9.03(d) in an aggregate principal amount at any time not to exceed $20,000,000.

(h) Debt in the form of guaranties by the Borrower or any of the Restricted Subsidiaries of Debt of (A) the Borrower or any of the Restricted Subsidiaries permitted under this Section 9.02 and (B) other Subsidiaries to the extent an Investment would be permitted under Section 9.05(g)(iii) or Section 9.05(q).

(i) Debt owed to insurance companies for premiums on policies required by Section 8.06.

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(j) other Debt not to exceed $5,000,000 (measured as of the date of incurrence) in the aggregate at any one time outstanding.

Section 9.03 Liens. The Borrower will not, and will not permit any of the Restricted Subsidiaries to, create, incur, assume or permit to exist any Lien on any of its Properties (now owned or hereafter acquired), except:

(a) Liens securing the payment of any Obligations.

(b) Liens described on Schedule 9.03.

(d) Liens encumbering assets securing Debt incurred to finance the purchase, construction or improvement of such assets (and any refinancings thereof which do not increase the principal amount thereof); provided that (i) the principal amount of the Debt secured by a purchased asset shall not exceed one hundred percent (100%) of the purchase price of such asset, (ii) such Liens shall not extend to or encumber any other asset of any Credit Party other than the agreement and proceeds and individual financings may be cross–collateralized with other asset specific acquisition/construction financings provided by such Person or its Affiliates, and (iii) such Liens shall attach to such purchased, constructed or improved asset within 180 days after such acquisition or the completion of such construction or improvement (or substantially contemporaneously with refinancings of such Debt which do not increase the amount thereof).

(e) Liens on the proceeds of insurance policies and unearned or refunded premiums securing Debt owed to an insurance company permitted by Section 9.02(i).

(f) Liens on Equity Interests in Unrestricted Subsidiaries and joint ventures that are not Restricted Subsidiaries, and rights directly related to such Equity Interests.

(g) Liens on intercompany receivables owing from Carrizo UK Huntington granted in connection with the Carrizo UK Facility to the extent such receivables arise from one or more Investments made in Carrizo UK Huntington in accordance with Section 9.05; provided, that recourse to the Person granting such Lien is limited solely to the Property so pledged.

(h) Liens securing obligations or Debt not in excess of $10,000,000 in the aggregate at any time.

Section 9.04 Dividends, Distributions and Redemptions; Repayment of Senior Notes.

(a) Restricted Payments. The Borrower will not, and will not permit any of the Restricted Subsidiaries to, declare or make, or agree to pay or make, directly or indirectly, any Restricted Payment, return any capital to its stockholders on account of its Equity Interests or make any distribution of its Property to its Equity Interest holders on account of its Equity Interests, except

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(i) the Borrower may declare and pay dividends with respect to its Equity Interests payable solely in additional shares of its Equity Interests (other than Disqualified Capital Stock),

(ii) Subsidiaries may declare and pay dividends ratably with respect to their Equity Interests,

(iii) the Borrower may make Restricted Payments pursuant to and in accordance with equity incentive plans, stock option plans or arrangements or other benefit plans or arrangements for management, employees or directors of the Borrower and the Restricted Subsidiaries in an amount not to exceed $3,000,000 during any fiscal year (with any portion of such $3,000,000 amount that is unused in any fiscal year to be carried forward to successive fiscal years and added to such amount) and $15,000,000 during the term of this Agreement,

(iv) the Borrower may make cash payments in lieu of issuing fractional shares in an aggregate amount not exceeding $200,000 during the term of this Agreement,

(v) the Borrower may declare and pay distributions of rights to acquire Equity Interests in the Borrower effecting “poison pill” rights plans, provided that any securities or rights so distributed have a nominal fair market value at the time of declaration,

(vi) the Borrower may make repurchases, redemptions, defeasances or other acquisitions or retirements for value of (A) any of its Equity Interests in connection with the exercise of stock options or other rights to acquire Equity Interests of the Borrower if such Equity Interests represent a portion of the exercise or exchange price thereof and (B) any of its Equity Interests held by any current or former officers, directors or employees of the Borrower or any of the Restricted Subsidiaries in connection with the exercise or vesting of any equity compensation (including, without limitation, stock options, restricted stock and phantom stock) in order to satisfy any tax withholding obligation with respect to such exercise or vesting; provided that the aggregate amount of Restricted Payments made pursuant to this clause (vi) shall not exceed $500,000 during any fiscal year (with any portion of such $500,000 amount that is unused in any fiscal year to be carried forward to successive fiscal years and added to such amount) and $2,500,000 during the term of this Agreement,

(vii) to the extent otherwise constituting a Restricted Payment, the Borrower may make repurchases, redemptions, defeasances or other acquisitions or retirements for value of any rights under any cash and/or equity-settled equity stock appreciation agreement or plan of the Borrower or any Restricted Subsidiary, and

(viii) if no Default, Event of Default or Borrowing Base Deficiency exists at the time of declaration, other Restricted Payments in an aggregate amount not to exceed $5,000,000 during any fiscal year (with any portion of such $5,000,000 amount that is unused in any fiscal year to be carried forward to successive fiscal years and added to such amount) and $25,000,000 during the term of this Agreement.

(b) Redemption of Senior Notes; Amendment of Indentures. The Borrower will not, and will not permit any of the Restricted Subsidiaries to:

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(i) Redeem the Senior Notes (other than (A) as the result of the conversion of Senior Notes into Equity Interests of the Borrower (other than Disqualified Capital Stock), (B) with the net cash proceeds of a substantially concurrent (for this purpose meaning 150 days) offering of common Equity Interests or Permitted Refinancing Debt, (C) cash payments made in settlement of the Borrower’s obligations under (1) the Existing Convertible Notes Indenture upon the conversion or required repurchase of any Existing Convertible Notes thereunder or (2) any other indenture pursuant to which any convertible notes of the Borrower are issued upon the conversion or required repurchase of any such convertible notes thereunder, and (D) voluntary Redemptions of the Existing Convertible Notes so long as (1) immediately after giving effect to any such Redemption, Availability is greater than or equal to 25% of the Borrowing Base and (2) the aggregate amount paid by the Borrower and the Restricted Subsidiaries to effect all such Redemptions does not exceed $30,000,000); or

(ii) amend, modify, waive or otherwise change, consent or agree to any amendment, modification, waiver or other change to, any of the terms of any of the Senior Notes or any of the Indentures pursuant to which the Senior Notes are issued if the effect thereof would be to shorten the maturity of any of the Senior Notes to a date that is earlier than 91 days after the Maturity Date or to shorten the average life of any of the Senior Notes to a period that is shorter than the period from the date of effectiveness of any such amendment, modification, waiver or other change to the date that is 91 days after the then-effective Maturity Date, provided that the foregoing shall not prohibit the execution of supplemental indentures associated with (A) the incurrence of additional Senior Notes to the extent permitted by Section 9.02(f), (B) the issuance of Permitted Refinancing Debt, (C) the addition of guarantors if required by the terms of any Indenture provided such Person complies with Section 8.13(b) or (D) the correction of defects, ambiguities or deficiencies which can be adopted without consent of all or any portion of the holders of the Senior Notes.

For the avoidance of doubt, the issuance of Senior Notes pursuant to an Exchange Offer in exchange for previously issued Senior Notes shall not constitute a Redemption of Senior Notes.

Section 9.05 Investments, Loans and Advances. The Borrower will not, and will not permit any of the Restricted Subsidiaries to, make or permit to remain outstanding any Investments in or to any Person, except that the foregoing restriction shall not apply to:

(a) Investments reflected in the Financial Statements or which are disclosed in Schedule 9.05 and any refinancings or replacements thereof, provided that the amount of such Investment is not increased.

(b) accounts receivable arising in the ordinary course of business and endorsements of negotiable instruments for deposit and collection in the ordinary course of business.

(c) readily marketable direct obligations of the United States or any agency thereof, or obligations guaranteed by the United States or any agency thereof, in each case maturing within one year from the date of creation thereof.

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(d) commercial paper maturing within one year from the date of creation thereof rated in one of the two highest grades by S&P or Xxxxx’x.

(e) deposits maturing within one year from the date of creation thereof with, including certificates of deposit issued by, any Lender or any office located in the United States of any other bank or trust company which is organized under the laws of the United States or any state thereof, has capital, surplus and undivided profits aggregating at least $100,000,000 (as of the date of such bank or trust company’s most recent financial reports) and has a short term deposit rating of no lower than A2 or P2, as such rating is set forth from time to time, by S&P or Xxxxx’x, respectively, or, in the case of any Foreign Subsidiary, a bank organized in a jurisdiction in which the Foreign Subsidiary conducts operations having assets in excess of $500,000,000 (or its equivalent in another currency).

(f) deposits in money market funds investing exclusively in Investments described in Section 9.05(c), Section 9.05(d) or Section 9.05(e).

(g) Investments (measured on a cost basis) (i) made by the Borrower or any Guarantor in or to the Borrower or any other Guarantor, (ii) made by any Subsidiary in or to the Borrower or any Guarantor and (iii) made by the Borrower or any Guarantor in or to all other Subsidiaries which are not Guarantors which, together with the guaranties permitted by Section 9.02(h)(B), do not at the time of making any such Investment, exceed 2.5% of the consolidated quarterly revenues of the Borrower and the Restricted Subsidiaries for the most recent fiscal quarter for which financial statements have been delivered pursuant to Section 8.01(a) or 8.01(b); provided that Investments made pursuant to the UK Cost Overrun Guarantee shall not be permitted to be made under this clause (iii).

(h) Investments (including, without limitation, capital contributions) in general or limited partnerships or other types of entities (each a “venture”) entered into by the Borrower or any of the Restricted Subsidiaries with others; provided that (i) any such venture is engaged exclusively in oil and gas exploration, development, production, processing and related activities, including transportation, (ii) the interest in such venture is acquired on fair and reasonable terms and (iii) such venture interests acquired and capital contributions made (valued as of the date such interest was acquired or the contribution made) do not exceed, in the aggregate at any time outstanding, an amount equal to $15,000,000.

(i) Investments in direct ownership interests in additional Oil and Gas Properties and gas gathering systems related thereto or related to or made pursuant to the requirements of farm-out, farm-in, joint operating, joint venture or area of mutual interest agreements, gathering systems, pipelines or other similar arrangements which are usual and customary in the oil and gas exploration and production business located within the geographic boundaries of the United States of America.

(j) the contribution to Carrizo UK Huntington of the North Sea Properties.

(k) Investments in stock, obligations or securities received in settlement of debts arising from Investments permitted under this Section 9.05 owing to the Borrower or any Restricted Subsidiary as a result of a bankruptcy or other insolvency proceeding of the obligor

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in respect of such debts or upon the enforcement of any Lien in favor of the Borrower or any of its Restricted Subsidiaries.

(l) prepayments on drilling contracts, deposits made for Property acquisitions and advance payments made on undeveloped leases and for configuration of gathering systems or otherwise, in each case in the ordinary course of business of the Borrower and the Restricted Subsidiaries.

(m) Investments made as a result of the receipt of non-cash consideration in connection with any disposition of Property permitted hereunder.

(n) Investments (i) the consideration for which consists solely of common Equity Interests of the Borrower or warrants, options or other rights to purchase or acquire common Equity Interests of the Borrower or (ii) with up to 100% of the net cash proceeds of an offering of common Equity Interests by the Borrower (to the extent made within 150 days of the closing of such offering), in each case in (A) joint ventures engaging in businesses conducted by companies in the oil and gas industry, (B) any Unrestricted Subsidiary or non-Guarantor Restricted Subsidiary or (C) any other Person, so long as, immediately after giving effect to any such Investment made pursuant to this clause (C), Availability is equal to or greater than 30% of the Borrowing Base.

(o) Investments made in connection with the purchase, lease or other acquisition of tangible assets of any Person, and investments made in connection with the purchase, lease or other acquisition of the Equity Interests of any Person (including by the merger or consolidation of such Person into the Borrower or any of the Restricted Subsidiaries); provided that (i) any newly acquired Material Domestic Subsidiary shall promptly comply with the requirements of Section 8.13(b), (ii) no Default exists immediately before and immediately after giving effect to such Investment and (iii) after giving effect to such Investment, the Borrower shall be in pro forma compliance with the covenants set forth in Section 9.01 as of the last day of the fiscal quarter most recently ended for which financial statements have been delivered pursuant to Section 8.01(a) or 8.01(b), as the case may be, with such covenants being calculated as if such acquisition had occurred on the first day of the period of four consecutive fiscal quarters ending on such day.

(p) Investments by the Borrower or any of the Restricted Subsidiaries consisting of profit interests in Avista JV Partner and Investments received by the Borrower or any of the Restricted Subsidiaries in exchange for such profit interests in connection with a merger, conversion, consolidation or other combination of Avista JV Partner with another Person.

(q) other Investments made after the Effective Date (including Investments in Unrestricted Subsidiaries and Foreign Restricted Subsidiaries made after the Effective Date) not to exceed $80,000,000 (measured on a cost basis) in the aggregate at any time; provided that no Event of Default exists or would result from such Investment.

Section 9.06 Nature of Business. The Borrower will not, and will not permit any of the Restricted Subsidiaries to, allow any material change to be made in the character of its business

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as an independent oil and gas exploration and production company and activities reasonably incidental or related thereto.

Section 9.07 Proceeds of Notes. The Borrower will not permit the proceeds of the Notes to be used for any purpose other than those permitted by Section 7.21. Neither the Borrower nor any Person acting on behalf of the Borrower has taken or will take any action which would cause any of the Loan Documents to violate Regulations T, U or X or any other regulation of the Board or to violate Section 7 of the Securities Exchange Act of 1934 or any rule or regulation thereunder, in each case as now in effect or as the same may hereinafter be in effect. If requested by the Administrative Agent, the Borrower will furnish to the Administrative Agent a statement to the foregoing effect in conformity with the requirements of FR Form U-1 or such other form referred to in Regulation U, Regulation T or Regulation X of the Board, as the case may be.

Section 9.08 ERISA Compliance. The Borrower will not, and will not permit any of the Restricted Subsidiaries to, at any time to the extent that any of the following could reasonably be expected to have a Material Adverse Effect:

(a) engage in, or permit any ERISA Affiliate to engage in, any transaction in connection with which the Borrower, any Restricted Subsidiary or any ERISA Affiliate could be subjected to either a civil penalty assessed pursuant to subsections (c), (i), (l) or (m) of section 502 of ERISA or a tax imposed by Chapter 43 of Subtitle D of the Code.

(b) fail to make, or permit any ERISA Affiliate to fail to make, full payment when due of all amounts which, under the provisions of any Plan, agreement relating thereto or applicable law, the Borrower, any Restricted Subsidiary or any ERISA Affiliate is required to pay as contributions thereto.

(c) contribute to or assume an obligation to contribute to, or permit any ERISA Affiliate to contribute to or assume an obligation to contribute to (i) any employee welfare benefit plan, as defined in section 3(1) of ERISA, including, without limitation, any such plan maintained to provide benefits to former employees of such entities, that may not be terminated by such entities in their sole discretion at any time without any material liability, except as set forth on Schedule 9.08(c), or (ii) any employee pension benefit plan, as defined in section 3(2) of ERISA, that is subject to Title IV of ERISA, section 302 of ERISA or section 412 of the Code.

Section 9.09 Sale or Discount of Receivables. Except for receivables obtained by the Borrower or any of the Restricted Subsidiaries out of the ordinary course of business or the settlement of joint interest billing accounts in the ordinary course of business or discounts granted to settle collection of accounts receivable or the sale of defaulted accounts arising in the ordinary course of business in connection with the compromise or collection thereof and not in connection with any financing transaction, the Borrower will not, and will not permit any of the Restricted Subsidiaries to, discount or sell (with or without recourse) any of its notes receivable or accounts receivable.

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Section 9.10 Mergers, Etc. The Borrower will not, and will not permit any of the Restricted Subsidiaries to, merge into or with or consolidate with any other Person, or permit any other Person to merge into or consolidate with it, or sell, transfer, lease or otherwise dispose of (whether in one transaction or in a series of related transactions) all or substantially all of its Property to any other Person (whether now owned or hereafter acquired) (any such transaction, a “consolidation”); provided that (a) any Restricted Subsidiary may participate in a consolidation with (i) the Borrower so long as the Borrower shall be the continuing or surviving entity or transferee, as applicable, or (ii) any other Subsidiary (provided that if one of such Subsidiaries is a Wholly-Owned Subsidiary, then the continuing or surviving Person or transferee, as applicable, shall be a Wholly-Owned Subsidiary), (b) the Borrower and the Restricted Subsidiaries may engage in Sales permitted by clauses (a) through (e) of Section 9.11 and Sales of Property of any type not restricted under Section 9.11, and (c) the Borrower and the Restricted Subsidiaries may make Investments permitted by Section 9.05.

Section 9.11 Sale of Oil and Gas Properties. The Borrower will not, and will not permit any of the Restricted Subsidiaries to, sell, assign (other than assignments intended to convey a Lien), farm-out, convey or otherwise transfer (collectively, a “Sale”) any Oil and Gas Property or Equity Interests of any Restricted Subsidiary owning Oil and Gas Properties to any Person other than the Borrower or any Restricted Subsidiary, except for:

(a) the Sale of Hydrocarbons and geological and seismic data in the ordinary course of business;

(b) farmouts of undeveloped acreage to which no proved reserves are attributable and assignments in connection with such farmouts;

(c) the Sale of equipment that is no longer necessary or useful for the business of the Borrower or such Restricted Subsidiary or is replaced by equipment of at least comparable value and use, or the Sale of surplus equipment;

(d) unless an Event of Default has occurred and is continuing, the Sale of any Oil and Gas Property or any interest therein or the Sale of any Equity Interests of any Restricted Subsidiary owning Oil and Gas Properties; provided (with respect to this clause (d) only) that (i) the consideration received in respect of such Sale shall be any of the following (or a combination thereof): (1) cash, (2) the assumption of liabilities not constituting debt for borrowed money associated with the assets subject of such Sale (provided the assumption of liabilities shall not exceed 10% of the aggregate consideration for such Sale), (3) other Oil and Gas Properties (provided that such exchange qualifies for nonrecognition of gain or loss under the provisions of Section 1031 of the Code), or (4) in the case of farm-outs, carried or royalty or net profits interests in the Property subject of such farm-out (provided that, notwithstanding the foregoing, if a Borrowing Base Deficiency results from such Sale, the cash portion of the consideration shall be an amount at least sufficient to pay such Borrowing Base Deficiency under Section 3.04(c)(iii)), (ii) the consideration received in respect of such Sale shall be equal to or greater than the fair market value of the Property subject of such Sale (as determined in good faith by a Financial Officer, provided that if a Financial Officer determines in good faith that such Sale involves Oil and Gas Property or Equity Interests in a Restricted Subsidiary owning any Oil and Gas Property having a fair market value in excess of $25,000,000, the

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board of directors of the Borrower shall reasonably determine whether the consideration received in respect of such Sale is equal to or greater than the fair market value of the Property subject of such Sale and, if requested by the Administrative Agent, the Borrower shall deliver a certificate of a Responsible Officer certifying to that effect), (iii) in the case of any Sale of Oil and Gas Properties included in the most recently delivered Reserve Report or Equity Interests of a Restricted Subsidiary owning Oil and Gas Properties included in the most recently delivered Reserve Report, if the aggregate consideration received in respect of such Sale, together with the aggregate consideration received in respect of all other Sales of Oil and Gas Properties included in the most recently delivered Reserve Report and Sales of Restricted Subsidiaries owning Oil and Gas Properties included in the most recently delivered Reserve Report effected since the most recent Scheduled Redetermination Date, would exceed an amount equal to five percent (5%) of the then effective Borrowing Base, the Borrowing Base shall be reduced, effective immediately upon the consummation of such Sale, by an amount equal to the value, if any, attributable to the Property that is being disposed of pursuant to such Sale in the then-current Borrowing Base, as determined by Administrative Agent and confirmed by the Required Lenders after the receipt of the notice contemplated by Section 8.01(i) by the Administrative Agent;

(e) the Sale of such Property to which the exceptions pursuant to Section 9.11(a) to (d) or (f) do not apply or are not relied upon having a fair market value not to exceed $1,000,000 during any 6-month period; and

(f) the Sale of such Property to the extent permitted by Section 9.05 or Section 9.10.

Section 9.12 Environmental Matters. The Borrower will not, and will not permit any Credit Party to, cause or permit any of its Property to be in violation of, or do anything or permit anything to be done which will subject any such Property to a Release or threatened Release of Hazardous Materials, exposure to any Hazardous Materials, or to any Remedial Work under any Environmental Laws, assuming disclosure to the applicable Governmental Authority of all relevant facts, conditions and circumstances, if any, pertaining to such Property where such violations, Release or threatened Release, exposure, or Remedial Work could reasonably be expected to have a Material Adverse Effect.

Section 9.13 Transactions with Affiliates. The Borrower will not, and will not permit any of the Restricted Subsidiaries to, enter into any transaction, including, without limitation, any purchase, sale, lease or exchange of Property or the rendering of any service, with any Affiliate (other than the Guarantors and Wholly-Owned Subsidiaries of the Borrower) unless such transactions are otherwise not prohibited under this Agreement and are upon terms substantially as favorable to it as it would obtain in a comparable transaction with a Person not an Affiliate (or, if in the good faith judgment of the Borrower’s Board of Directors, no comparable transaction is available with which to compare any such transaction, such transaction is otherwise fair to the Borrower or the relevant Restricted Subsidiary from a financial point of view); provided that the foregoing shall not apply to:

(a) transactions described on Schedule 9.13;

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(b) any Restricted Payment permitted by Section 9.04, Debt permitted by Section 9.02, or Investments permitted by Section 9.05;

(c) the payment of reasonable and customary directors’ fees and other benefits to Persons who are not otherwise Affiliates of the Borrower or any Restricted Subsidiary;

(d) any employment or severance or other employee compensation, arrangement or plan or any amendment thereto, entered into by the Borrower or any of the Restricted Subsidiaries in the ordinary course of business or which is customary in the oil and gas business, and payments, awards, grants or issuances of Equity Interests pursuant thereto;

(e) provision of officers’ and directors’ indemnification and insurance in the ordinary course of business to the extent permitted by law; and

(f) transactions with Avista or any of its Subsidiaries or any other Affiliate entered into in connection with the Avista Marcellus Joint Venture.

Section 9.14 Negative Pledge Agreements; Dividend Restrictions. The Borrower will not, and will not permit any of the Restricted Subsidiaries to, create, incur, assume or suffer to exist any contract, agreement or understanding (other than this Agreement, the Security Instruments) which in any way prohibits or restricts the granting, conveying, creation or imposition of any Lien on any of its Property in favor of the Administrative Agent and the Lenders or restricts any Restricted Subsidiary from paying dividends or making distributions to the Borrower or any Guarantor, or which requires the consent of or notice to other Persons in connection therewith; provided that the foregoing shall not prevent (a) prohibitions or restrictions in joint venture agreements or agreements entered into in connection with joint ventures with respect to the transfer of, or the making of dividends or distributions with respect to, Equity Interests in any joint venture, or with respect to the transfer of or other encumbrance with respect to Property that is the subject of any joint venture or agreements entered into in connection therewith, (b) customary non-assignment provisions in leases, licenses, permits and other agreements entered into in the ordinary course of business, (c) in connection with any Sale of Property permitted hereunder, any restriction with respect to such Property imposed under the agreement or agreements governing such Sale, (d) restrictions imposed by any Governmental Authority or under any Governmental Requirement or (e) any restriction imposed on the granting, conveying, creation or imposition of any Lien on any Property of the Borrower or any of the Restricted Subsidiaries imposed by any contract, agreement or understanding related to the Liens permitted under clause (b), (d), (e), (f), (g) or (h) of Section 9.03 so long as such restriction only applies to the Property permitted under such clauses to be encumbered by such Liens.

Section 9.15 Hedge Agreements.

(a) The Borrower will not, and will not permit any of the Restricted Subsidiaries to, enter into or maintain any Hedge Agreements with any Person other than:

(i) Hedge Agreements in respect of commodities (A) with an Approved Counterparty and (B) the notional volumes for which (when aggregated with other commodity Hedge Agreements then in effect other than basis differential swaps on volumes already hedged pursuant to other Hedge Agreements) do not exceed, as of the date such Hedge

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Agreement is executed or at any time during the term of this Agreement, the percentage set forth below of the Credit Parties’ Current Production for each month during the period during which such Hedge Agreement is in effect, for each of crude oil, natural gas liquids and natural gas, calculated separately:

Calendar Year Hedged (relative to measurement date)	Percentage Limitation Oil NGL’s/ Gas
Months 1-24	100%	100%
Months 25-36	75%	75%
Months 37-48	50%	50%

No Hedge Agreement in respect of commodities shall have a tenor of longer than 4 years. For purposes of the foregoing volume limitations, floors and puts shall be disregarded.

(ii) Hedge Agreements in respect of interest rates with an Approved Counterparty, as follows: (A) Hedge Agreements effectively converting interest rates from fixed to floating, the notional amounts of which (when aggregated with all other Hedge Agreements of the Borrower and the Credit Parties then in effect effectively converting interest rates from fixed to floating) do not exceed 50% of the then outstanding principal amount of any Credit Party’s Debt for borrowed money which bears interest at a fixed rate and (B) Hedge Agreements effectively converting interest rates from floating to fixed, the notional amounts of which (when aggregated with all other Hedge Agreements of the Borrower and the Credit Parties then in effect effectively converting interest rates from floating to fixed) do not exceed 75% of the then outstanding principal amount of any Credit Party’s Debt for borrowed money which bears interest at a floating rate.

(b) In no event shall any Hedge Agreement contain any requirement, agreement or covenant for the Borrower or any Restricted Subsidiary to post collateral or margin to secure its obligations under such Hedge Agreement or to cover market exposures, other than collateral or margin not in excess of $2,000,000 for all Hedge Agreements of the Borrower and the Restricted Subsidiaries at any time to the extent permitted under Section 9.03(h); provided that this sentence shall not prevent a Hedge Bank from requiring the obligations under any Hedge Agreement with the Borrower or any Restricted Subsidiary to be secured by the Liens granted to the Administrative Agent under the Security Instruments pursuant to such Security Instruments.

(c) In no event shall any Hedge Position Cancellation Event occur if (i) an Event of Default has occurred and is continuing at the time of such Hedge Position Cancellation Event and (ii) immediately after giving effect to such Hedge Position Cancellation Event and any concurrent prepayments of the Loans, Availability would be less than $5,000,000.

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Section 9.16 Unrestricted Subsidiaries.

(a) Unless designated as an Unrestricted Subsidiary on Schedule 7.14 as of the date hereof or thereafter, subject to Section 9.16(b), any Person that becomes a Wholly Owned Subsidiary of the Borrower or any of its Restricted Subsidiaries shall be classified as a Restricted Subsidiary.

(b) The Borrower may designate by written notification thereof to the Administrative Agent, any Restricted Subsidiary, including a newly formed or newly acquired Subsidiary, as an Unrestricted Subsidiary if (i) prior, and after giving effect, to such designation, neither a Default nor a Borrowing Base Deficiency would exist and (ii) such designation is deemed to be an Investment in an Unrestricted Subsidiary in an amount equal to the fair market value as of the date of such designation of the Borrower’s direct and indirect ownership interest in such Subsidiary and such Investment would be permitted to be made at the time of such designation under Section 9.05(o). Except as provided in this Section 9.16(b), no Restricted Subsidiary may be redesignated as an Unrestricted Subsidiary.

(c) The Borrower may designate any Unrestricted Subsidiary to be a Restricted Subsidiary if, immediately after giving effect to such designation: (i) the representations and warranties of the Credit Parties contained in each of the Loan Documents are true and correct in all material respects on and as of such date as if made on and as of the date of such redesignation (or, if stated to have been made expressly as of an earlier date, were true and correct in all material respects as of such date), (ii) no Default exists and (iii) the Borrower complies with the requirements of Section 8.13 and Section 8.16. Any such designation shall be treated as a cash dividend in an amount equal to the lesser of (A) the fair market value of the Borrower’s and the Restricted Subsidiaries’ direct and indirect ownership interest in such Subsidiary and (B) the amount of the Borrower’s and the Restricted Subsidiaries’ cost basis of their investment previously made for purposes of the limitation on Investments under Section 9.05(g)(iii) and/or Section 9.05(o).

(d) No Unrestricted Subsidiary shall have any Debt other than Non-Recourse Debt. The aggregate principal amount of all Non-Recourse Debt outstanding at any one time shall not exceed $120,000,000.

Section 9.17 Gas Imbalances, Take-or-Pay or Other Prepayments. The Borrower will not, and will not permit any Restricted Subsidiary to, allow gas imbalances, take-or-pay or other prepayments with respect to the Oil and Gas Properties of the Borrower or any Restricted Subsidiary that would require the Borrower or such Restricted Subsidiary to deliver Hydrocarbons at some future time without then or thereafter receiving full payment therefor to exceed a volume equal to one-half Bcf of gas (on an Mcf equivalent basis) in the aggregate.

ARTICLE X

Events of Default; Remedies

Section 10.01 Events of Default. One or more of the following events shall constitute an “Event of Default”:

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(a) the Borrower shall fail to pay any principal of any Loan or any reimbursement obligation in respect of any LC Disbursement when and as the same shall become due and payable, whether at the due date thereof or at a date fixed for prepayment thereof, by acceleration or otherwise.

(b) the Borrower shall fail to pay any interest on any Loan or any fee or any other amount (other than an amount referred to in Section 10.01(a)) payable under any Loan Document, when and as the same shall become due and payable, and such failure shall continue unremedied for a period of three Business Days.

(c) any representation or warranty made or deemed made by or on behalf of the Borrower or any other Credit Party in or in connection with any Loan Document or any amendment or modification of any Loan Document or waiver under such Loan Document, or in any certificate furnished pursuant to or in connection with any Loan Document, shall prove to have been materially incorrect when made or deemed made.

(d) the Borrower shall fail to observe or perform any covenant, condition or agreement contained in Section 8.01(l), Section 8.02, Section 8.03 (with respect to the legal existence of the Borrower or any other Credit Party) or in Article IX.

(e) the Borrower or any other Credit Party shall fail to observe or perform any covenant, condition or agreement contained in this Agreement (other than those specified in Section 10.01(a) to (d)) or any other Loan Document, and such failure shall continue unremedied for a period of 30 days after the earlier to occur of (A) notice thereof from the Administrative Agent to the Borrower (which notice will be given at the request of any Lender) or (B) a Responsible Officer otherwise becoming aware of such default.

(f) the Borrower or any other Credit Party shall fail to make any payment (of principal or interest) in respect of any Material Indebtedness, when and as the same shall become due and payable, after the expiration of any applicable period of grace and/or notice and cure.

(g) any event or condition occurs that results in any Material Indebtedness becoming due prior to its scheduled maturity or that enables or permits the holder or holders of any Material Indebtedness or any trustee or agent on its or their behalf to cause any Material Indebtedness to become due, or to require the Redemption thereof or any offer to Redeem to be made in respect thereof, prior to its scheduled maturity or require the Borrower or any other Credit Party to make an offer in respect thereof; provided that this clause (g) shall not apply to secured Debt permitted under Section 9.02(g) that becomes due as a result of the voluntary sale or transfer of the property or assets securing such Indebtedness.

(h) an involuntary proceeding shall be commenced or an involuntary petition shall be filed seeking (i) liquidation, reorganization or other relief in respect of the Borrower or any other Credit Party or its debts, or of a substantial part of its assets, under any Federal, state or foreign bankruptcy, insolvency, receivership or similar law now or hereafter in effect or (ii) the appointment of a receiver, trustee, custodian, sequestrator, conservator or similar official for the Borrower or any other Credit Party or for a substantial part of its assets, and, in any such

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case, such proceeding or petition shall continue undismissed for 60 days or an order or decree approving or ordering any of the foregoing shall be entered.

(i) the Borrower or any other Credit Party shall (i) voluntarily commence any proceeding or file any petition seeking liquidation, reorganization or other relief under any Federal, state or foreign bankruptcy, insolvency, receivership or similar law now or hereafter in effect, (ii) consent to the institution of, or fail to contest in a timely and appropriate manner, any proceeding or petition described in Section 10.01(h), (iii) apply for or consent to the appointment of a receiver, trustee, custodian, sequestrator, conservator or similar official for the Borrower or any other Credit Party or for a substantial part of its assets, (iv) file an answer admitting the material allegations of a petition filed against it in any such proceeding, (v) make a general assignment for the benefit of creditors or (vi) take any action for the purpose of effecting any of the foregoing.

(j) the Borrower or any other Credit Party shall become unable, admit in writing its inability or fail generally to pay its debts generally as they become due.

(k) (i) one or more judgments for the payment of money in an aggregate amount in excess of $10,000,000 (to the extent not covered by independent third party insurance as to which the insurer does not dispute coverage and is not subject to an insolvency proceeding) or (ii) any one or more non-monetary judgments that have, or could reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect, shall be rendered against any Credit Party and the same shall remain undischarged for a period of 30 consecutive days during which execution shall not be effectively stayed, or any action shall be legally taken by a judgment creditor to attach or levy upon any assets of the Borrower or any other Credit Party to enforce any such judgment.

(l) the Loan Documents after delivery thereof shall for any reason, except to the extent permitted by the terms thereof, cease to be in full force and effect and valid, binding and enforceable in accordance with their terms against the Borrower or a Guarantor party thereto or shall be repudiated by any of them, or cease to create a valid and perfected Lien of the priority required thereby on any material portion of the collateral purported to be covered thereby, except to the extent permitted by the terms of this Agreement, or the Borrower or any other Credit Party shall so state in writing.

(m) a Change in Control shall occur.

Section 10.02 Remedies.

(a) In the case of an Event of Default other than one described in Section 10.01(h) or Section 10.01(i) at any time thereafter during the continuance of such Event of Default, the Majority Lenders may, by notice to the Borrower, take either or both of the following actions, at the same or different times: (i) terminate the Commitments, and thereupon the Commitments shall terminate immediately, and (ii) declare the Notes and the principal of the Loans then outstanding, together with accrued interest thereon and all fees and the other obligations of the Borrower and the Guarantors accrued hereunder and under the Notes and the other Loan Documents then outstanding to be due and payable in whole (or in

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part, in which case any principal not so declared to be due and payable may thereafter be declared to be due and payable), and thereupon the principal of the Loans so declared to be due and payable, together with accrued interest thereon and all fees and other obligations of the Borrower and the Guarantors accrued hereunder and under the Notes and the other Loan Documents (including, without limitation, the payment of cash collateral to secure the LC Exposure as provided in Section 2.08(j)), shall become due and payable immediately, without presentment, demand, protest, notice of intent to accelerate, notice of acceleration or other notice of any kind, all of which are hereby waived by the Borrower and each Guarantor; and in case of an Event of Default described in Section 10.01(h) or Section 10.01(i), the Commitments shall automatically terminate and the Notes and the principal of the Loans then outstanding, together with accrued interest thereon and all fees and the other obligations of the Borrower and the Guarantors accrued hereunder and under the Notes and the other Loan Documents (including, without limitation, the payment of cash collateral to secure the LC Exposure as provided in Section 2.08(j)), shall automatically become due and payable, without presentment, demand, protest or other notice of any kind, all of which are hereby waived by the Borrower and each Guarantor.

(b) In the case of the occurrence of an Event of Default, the Administrative Agent and the Lenders will have all other rights and remedies available at law and equity.

(c) Except as otherwise provided in Section 4.03, all proceeds realized from the liquidation or other disposition of collateral or otherwise received after maturity of the Notes, whether by acceleration or otherwise, shall be applied:

(i) first, to payment or reimbursement of that portion of the Obligations constituting fees, expenses and indemnities payable to the Administrative Agent in its capacity as such;

(ii) second, pro rata to payment or reimbursement of that portion of the Obligations constituting fees, expenses and indemnities payable to the Lenders;

(iii) third, pro rata to payment of accrued interest on the Loans;

(iv) fourth, pro rata to payment of principal outstanding on the Loans, Obligations referred to in clauses (b) and (c) of the definition of Obligations and to serve as cash collateral to be held by the Administrative Agent to secure the LC Exposure;

(v) fifth, pro rata to any other Obligations; and

(vi) sixth, any excess, after all of the Obligations shall have been indefeasibly paid in full in cash (other than indemnities and other contingent obligations not then due and payable and as to which no claim has been made as of the time of determination), shall be paid to the Borrower or as otherwise required by any Governmental Requirement.

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ARTICLE XI

The Agents

Section 11.01 Appointment; Powers. Each of the Lenders and the Issuing Bank hereby irrevocably appoints the Administrative Agent as its agent and authorizes the Administrative Agent to take such actions on its behalf and to exercise such powers as are delegated to the Administrative Agent by the terms hereof and the other Loan Documents, together with such actions and powers as are reasonably incidental thereto.

Section 11.02 Duties and Obligations of Administrative Agent. The Administrative Agent shall not have any duties or obligations except those expressly set forth in the Loan Documents. Without limiting the generality of the foregoing, (a) the Administrative Agent shall not be subject to any fiduciary or other implied duties, regardless of whether a Default has occurred and is continuing (the use of the term “agent” herein and in the other Loan Documents with reference to the Administrative Agent is not intended to connote any fiduciary or other implied (or express) obligations arising under agency doctrine of any applicable law; rather, such term is used merely as a matter of market custom, and is intended to create or reflect only an administrative relationship between independent contracting parties), (b) the Administrative Agent shall have no duty to take any discretionary action or exercise any discretionary powers, except as provided in Section 11.03, and (c) except as expressly set forth herein, the Administrative Agent shall not have any duty to disclose, and shall not be liable for the failure to disclose, any information relating to the Borrower or any other Credit Party that is communicated to or obtained by the bank serving as Administrative Agent or any of its Affiliates in any capacity. The Administrative Agent shall be deemed not to have knowledge of any Default unless and until written notice thereof is given to the Administrative Agent by the Borrower or a Lender, and shall not be responsible for or have any duty to ascertain or inquire into (i) any statement, warranty or representation made in or in connection with this Agreement or any other Loan Document, (ii) the contents of any certificate, report or other document delivered hereunder or under any other Loan Document or in connection herewith or therewith, (iii) the performance or observance of any of the covenants, agreements or other terms or conditions set forth herein or in any other Loan Document, (iv) the validity, enforceability, effectiveness or genuineness of this Agreement, any other Loan Document or any other agreement, instrument or document, (v) the satisfaction of any condition set forth in Article VI or elsewhere herein, other than to confirm receipt of items expressly required to be delivered to the Administrative Agent or as to those conditions precedent expressly required to be to the Administrative Agent’s satisfaction, (vi) the existence, value, perfection or priority of any collateral security or the financial or other condition of the Borrower and the Credit Parties or any other obligor or guarantor, or (vii) any failure by the Borrower or any other Person (other than itself) to perform any of its obligations hereunder or under any other Loan Document or the performance or observance of any covenants, agreements or other terms or conditions set forth herein or therein. For purposes of determining compliance with the conditions specified in Article VI, each Lender shall be deemed to have consented to, approved or accepted or to be satisfied with, each document or other matter required thereunder to be consented to or approved by or acceptable or satisfactory to a Lender unless the Administrative Agent shall have received written notice from such Lender prior to the proposed closing date specifying its objection thereto.

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Section 11.03 Action by Administrative Agent. The Administrative Agent shall have no duty to take any discretionary action or exercise any discretionary powers, except discretionary rights and powers expressly contemplated hereby or by the other Loan Documents that the Administrative Agent is required to exercise in writing as directed by the Majority Lenders, the Required Lenders or such other number or percentage of the Lenders as shall be necessary under the circumstances as provided in Section 12.02; and in all cases the Administrative Agent shall be fully justified in failing or refusing to act hereunder or under any other Loan Documents unless it shall (a) receive written instructions from the Majority Lenders, the Required Lenders or the Lenders, as applicable (or such other number or percentage of the Lenders as shall be necessary under the circumstances as provided in Section 12.02) specifying the action to be taken and (b) be indemnified to its satisfaction by the Lenders against any and all liability and expenses which may be incurred by it by reason of taking or continuing to take any such action. The instructions as aforesaid and any action taken or failure to act pursuant thereto by the Administrative Agent shall be binding on all of the Lenders. If a Default has occurred and is continuing, then the Administrative Agent shall take such action with respect to such Default as shall be directed by the requisite Lenders in the written instructions (with indemnities) described in this Section 11.03, provided that, unless and until the Administrative Agent shall have received such directions, the Administrative Agent may (but shall not be obligated to) take such action, or refrain from taking such action, with respect to such Default as it shall deem advisable in the best interests of the Lenders. In no event, however, shall the Administrative Agent be required to take any action which exposes the Administrative Agent to personal liability or which is contrary to this Agreement, the other Loan Documents or applicable law. If a Default has occurred and is continuing, neither the Co-Syndication Agents nor the Co-Documentation Agents shall have any obligation to perform any act in respect thereof. The Administrative Agent shall not be liable for any action taken or not taken by it with the consent or at the request of the Majority Lenders, the Required Lenders or the Lenders (or such other number or percentage of the Lenders as shall be necessary under the circumstances as provided in Section 12.02), and otherwise the Administrative Agent shall not be liable for any action taken or not taken by it hereunder or under any other Loan Document or under any other document or instrument referred to or provided for herein or therein or in connection herewith or therewith INCLUDING ITS OWN ORDINARY NEGLIGENCE, except for its own gross negligence or willful misconduct.

Section 11.04 Reliance by Administrative Agent. The Administrative Agent shall be entitled to rely upon, and shall not incur any liability for relying upon, any notice, request, certificate, consent, statement, instrument, document or other writing believed by it to be genuine and to have been signed or sent by the proper Person. The Administrative Agent also may rely upon any statement made to it orally or by telephone and believed by it to be made by the proper Person, and shall not incur any liability for relying thereon and each of the Borrower, the Lenders and the Issuing Bank hereby waives the right to dispute the Administrative Agent’s record of such statement, except in the case of gross negligence or willful misconduct by the Administrative Agent. The Administrative Agent may consult with legal counsel (who may be counsel for the Borrower), independent accountants and other experts selected by it, and shall not be liable for any action taken or not taken by it in good faith in accordance with the advice of any such counsel, accountants or experts. The Administrative Agent may deem and treat the payee of any Note as the holder thereof for all purposes hereof unless and until a written notice of the

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assignment or transfer thereof permitted hereunder shall have been filed with the Administrative Agent.

Section 11.05 Subagents. The Administrative Agent may perform any and all its duties and exercise its rights and powers by or through any one or more sub-agents appointed by the Administrative Agent. The Administrative Agent and any such sub-agent may perform any and all its duties and exercise its rights and powers through their respective Related Parties. The exculpatory provisions of the preceding Sections of this Article XI shall apply to any such sub-agent and to the Related Parties of the Administrative Agent and any such sub-agent, and shall apply to their respective activities in connection with the syndication of the credit facilities provided for herein as well as activities as Administrative Agent.

Section 11.06 Resignation or Removal of Administrative Agent. Subject to the appointment and acceptance of a successor Administrative Agent as provided in this Section 11.06, the Administrative Agent may resign at any time by giving the Lenders, the Issuing Bank and the Borrower at least 30 days prior written notice, and the Administrative Agent may be removed at any time with or without cause by the Required Lenders. Upon any such resignation or removal, the Majority Lenders shall have the right, in consultation and with the consent of the Borrower, to appoint a successor. If no successor shall have been so appointed by the Majority Lenders and shall have accepted such appointment within 30 days after the retiring Administrative Agent gives notice of its resignation or the removal of the retiring Administrative Agent, then the retiring Administrative Agent may, on behalf of the Lenders and the Issuing Bank, appoint a successor Administrative Agent. Upon the acceptance of its appointment as Administrative Agent hereunder by a successor, such successor shall succeed to and become vested with all the rights, powers, privileges and duties of the retiring Administrative Agent, and the retiring Administrative Agent shall be discharged from its duties and obligations hereunder. The fees payable by the Borrower to a successor Administrative Agent shall be the same as those payable to its predecessor unless otherwise agreed between the Borrower and such successor. After the Administrative Agent’s resignation hereunder, the provisions of this Article XI and Section 12.03 shall continue in effect for the benefit of such retiring Administrative Agent, its sub-agents and their respective Related Parties in respect of any actions taken or omitted to be taken by any of them while it was acting as Administrative Agent.

Section 11.07 Agents as Lenders. Each bank serving as an Agent hereunder shall have the same rights and powers in its capacity as a Lender as any other Lender and may exercise the same as though it were not an Agent, and such bank and its Affiliates may accept deposits from, lend money to and generally engage in any kind of business with the Borrower or any other Credit Party or other Affiliate thereof as if it were not an Agent hereunder.

Section 11.08 No Reliance. Each Lender acknowledges that it has, independently and without reliance upon the Administrative Agent, any other Agent or any other Lender and based on such documents and information as it has deemed appropriate, made its own credit analysis and decision to enter into this Agreement and each other Loan Document to which it is a party. Each Lender also acknowledges that it will, independently and without reliance upon the Administrative Agent, any other Agent or any other Lender and based on such documents and information as it shall from time to time deem appropriate, continue to make its own decisions in taking or not taking action under or based upon this Agreement, any other Loan Document, any

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related agreement or any document furnished hereunder or thereunder. The Agents shall not be required to keep themselves informed as to the performance or observance by the Borrower or any other Credit Party of this Agreement, the Loan Documents or any other document referred to or provided for herein or to inspect the Properties or books of any Credit Party. Except for notices, reports and other documents and information expressly required to be furnished to the Lenders by the Administrative Agent hereunder, no Agent or the Arranger shall have any duty or responsibility to provide any Lender with any credit or other information concerning the affairs, financial condition or business of the Borrower or any other Credit Party (or any of their Affiliates) which may come into the possession of such Agent or any of its Affiliates. In this regard, each Lender acknowledges that Xxxxxx & Xxxxxx L.L.P. is acting in this transaction as special counsel to the Administrative Agent only, except to the extent otherwise expressly stated in any legal opinion or any Loan Document. Each other party hereto will consult with its own legal counsel at its own cost.

Section 11.09 Administrative Agent May File Proofs of Claim. In case of the pendency of any receivership, insolvency, liquidation, bankruptcy, reorganization, arrangement, adjustment, composition or other judicial proceeding relative to the Borrower or any other Credit Party, the Administrative Agent (irrespective of whether the principal of any Loan shall then be due and payable as herein expressed or by declaration or otherwise and irrespective of whether the Administrative Agent shall have made any demand on the Borrower) shall be entitled and empowered, by intervention in such proceeding or otherwise:

(a) to file and prove a claim for the whole amount of the principal and interest owing and unpaid in respect of the Loans and all other Obligations that are owing and unpaid and to file such other documents as may be necessary or advisable in order to have the claims of the Lenders and the Administrative Agent (including any claim for the reasonable compensation, expenses, disbursements and advances of the Lenders and the Administrative Agent and their respective agents and counsel and all other amounts due the Lenders and the Administrative Agent under Section 12.03) allowed in such judicial proceeding; and

(b) to collect and receive any monies or other property payable or deliverable on any such claims and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator or other similar official in any such judicial proceeding is hereby authorized by each Lender to make such payments to the Administrative Agent and, in the event that the Administrative Agent shall consent to the making of such payments directly to the Lenders, to pay to the Administrative Agent any amount due for the reasonable compensation, expenses, disbursements and advances of the Administrative Agent and its agents and counsel, and any other amounts due the Administrative Agent under Section 12.03.

Nothing contained herein shall be deemed to authorize the Administrative Agent to authorize or consent to or accept or adopt on behalf of any Lender any plan of reorganization, arrangement, adjustment or composition affecting the Obligations or the rights of any Lender or to authorize the Administrative Agent to vote in respect of the claim of any Lender in any such proceeding.

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Section 11.10 Authority of Administrative Agent to Release Collateral and Liens. Each Lender, the Issuing Bank and each other Secured Party (by its acceptance of the benefits of any Lien encumbering the Mortgaged Property) hereby authorizes the Administrative Agent to release any collateral that is permitted to be sold or released pursuant to the terms of the Loan Documents. Each Lender, the Issuing Bank and each other Secured Party (by its acceptance of the benefits of any Lien encumbering the Mortgaged Property) hereby authorizes the Administrative Agent to execute and deliver to the Borrower, at the Borrower’s sole cost and expense, any and all releases of Liens, termination statements, assignments or other documents reasonably requested by the Borrower in connection with any sale or other disposition of Property to the extent such sale or other disposition is permitted by the terms of Section 9.11 or is otherwise authorized by the terms of the Loan Documents. Upon the request of the Administrative Agent at any time, the Secured Parties will confirm in writing the Administrative Agent’s authority to release particular types or items of Collateral pursuant to this Section 11.10.

Section 11.11 The Arranger, the Co-Syndication Agents and the Co-Documentation Agents. The Arranger, the Co-Syndication Agents and the Co-Documentation Agents shall have no duties, responsibilities or liabilities under this Agreement and the other Loan Documents other than their duties, responsibilities and liabilities in their capacity as Lenders hereunder.

ARTICLE XII

Miscellaneous

Section 12.01 Notices.

(a) Except in the case of notices and other communications expressly permitted to be given by telephone (and subject to Section 12.01(b)), all notices and other communications provided for herein shall be in writing and shall be delivered by hand or overnight courier service, mailed by certified or registered mail or sent by telecopy (and, in the case of telecopy, followed by an electronic mail message), as follows:

(i) if to the Borrower or any Credit Party, to it at 0000 Xxxxxxxxx Xxxxxx, Xxxxx 0000, Xxxxxxx, Xxxxx 00000; Attention: Chief Financial Officer; Fax: (000) 000-0000; E-mail: xxxx.xxxxxx@xxxx.xxx; with a copy to the Law Department of the Borrower; Attention: General Counsel; Fax: (000) 000-0000; E-mail: xxxxx.xxxxxx@xxxx.xxx;

(ii) if to the Administrative Agent or to BNP, as the Issuing Bank, to it at 000 Xxxxxxxxxx Xxxx., Loan Servicing – 0xx Xxxxx, Xxxxxx Xxxx, Xxx Xxxxxx 00000, Attention: Xxxx Xxxxxx (Fax: (201) 850—4020, email: xxxxxx.xx.xxxxxxx@xxxxxxxx.xxxxxxxxxx.xxx), with a copy to 0000 Xxxxx Xxxxxx, Xxxxx 0000, Xxxxxxx, XX 00000; Attention: Xxxx Xxxxx (email: xxxx.xxxxx@xxxxxxxx.xxxxxxxxxx.xxx); and

(iii) if to any other Lender, to it at its address (or telecopy number) set forth in its Administrative Questionnaire.

(b) Notices and other communications to the Lenders hereunder may be delivered or furnished by electronic communications pursuant to procedures approved by the Administrative Agent; provided that the foregoing shall not apply to notices pursuant to Article II, Article III, Article IV and Article V unless otherwise agreed by the Administrative Agent

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and the applicable Lender. The Administrative Agent or the Borrower may, in its discretion, agree to accept notices and other communications to it hereunder by electronic communications pursuant to procedures approved by it; provided that approval of such procedures may be limited to particular notices or communications.

(c) Any party hereto may change its address or telecopy number for notices and other communications hereunder by notice to the other parties hereto. All notices and other communications given to any party hereto in accordance with the provisions of this Agreement shall be deemed to have been given on the date of receipt.

Section 12.02 Waivers; Amendments.

(a) No failure on the part of the Administrative Agent, the Issuing Bank or any Lender to exercise and no delay in exercising, and no course of dealing with respect to, any right, power or privilege, or any abandonment or discontinuance of steps to enforce such right, power or privilege, under any of the Loan Documents shall operate as a waiver thereof, nor shall any single or partial exercise of any right, power or privilege under any of the Loan Documents preclude any other or further exercise thereof or the exercise of any other right, power or privilege. The rights and remedies of the Administrative Agent, the Issuing Bank and the Lenders hereunder and under the other Loan Documents are cumulative and are not exclusive of any rights or remedies that they would otherwise have. No waiver of any provision of this Agreement or any other Loan Document or consent to any departure by the any Credit Party therefrom shall in any event be effective unless the same shall be permitted by Section 12.02(b), and then such waiver or consent shall be effective only in the specific instance and for the purpose for which given. Without limiting the generality of the foregoing, the making of a Loan or issuance of a Letter of Credit shall not be construed as a waiver of any Default, regardless of whether the Administrative Agent, any Lender or the Issuing Bank may have had notice or knowledge of such Default at the time.

(b) Neither this Agreement nor any provision hereof nor any Security Instrument nor any provision thereof may be waived, amended or modified except pursuant to an agreement or agreements in writing entered into by the Borrower and the Majority Lenders or by the Borrower and the Administrative Agent with the consent of the Majority Lenders; provided that no such agreement shall (1) increase the Commitment or the Maximum Credit Amount of any Lender without the written consent of such Lender, (2) increase the Borrowing Base without the written consent of each Lender, decrease or affirm at the existing amount the Borrowing Base without the consent of the Required Lenders, or modify Section 2.07 or 3.04(c) in any manner adverse to the Lenders without the consent of each Lender; provided that a Scheduled Redetermination may be postponed by the Required Lenders, (3) reduce the principal amount of any Loan or LC Disbursement or reduce the rate of interest thereon, or reduce any fees payable hereunder, or reduce any other Obligations hereunder or under any other Loan Document, without the written consent of each Lender affected thereby, (4) postpone the scheduled date of payment or prepayment of the principal amount of any Loan or LC Disbursement, or any interest thereon, or any fees payable hereunder, or any other Obligations hereunder or under any other Loan Document, or reduce the amount of, waive or excuse any such payment, or postpone or extend the Maturity Date without the written consent of each Lender affected thereby, (5) change Section 4.01(b), 4.01(c) or 10.02(c) in any manner

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that would alter the pro rata sharing of payments required thereby in a manner adverse to any Lender without the written consent of such Lender, (6) waive or amend Section 6.01 without the written consent of each Lender, (7) modify clause (b) of the definition of Obligations, Section 10.02(c), Sections 12.02(b)(7), Section 12.02(b)(9) or Section 12.13 without the consent of each Lender adversely affected thereby and the consent of each Person that is adversely affected thereby and a party to a Hedge Agreement secured by the Security Instruments which is not a Lender (or an Affiliate of a Lender) at the time of such agreement, (8) change any of the provisions of this Section 12.02(b) or the definitions of “Required Lenders” or “Majority Lenders” or any other provision hereof specifying the number or percentage of Lenders required to waive, amend or modify any rights hereunder or under any other Loan Documents or make any determination or grant any consent hereunder or any other Loan Documents, without the written consent of each Lender, (9) amend or otherwise modify any Security Instrument in a manner that results in the Obligations owed to any Person under any Hedge Agreement secured by such Security Instrument no longer being secured thereby, without the written consent of such Person, or (10) release any Guarantor (except as set forth in the Guaranty Agreement) or release all or a substantial portion of the Mortgaged Properties (other than as provided in Section 11.10) without the written consent of all Lenders; provided further that no such agreement shall amend, modify or otherwise affect the rights or duties of the Administrative Agent, any other Agent, or the Issuing Bank hereunder or under any other Loan Document without the prior written consent of the Administrative Agent, such other Agent or the Issuing Bank, as the case may be. Notwithstanding the foregoing, so long as each designation of an Unrestricted Subsidiary set forth therein complies with this Agreement, any supplement to Schedule 7.14 (Subsidiaries) shall be effective simply by delivering to the Administrative Agent a supplemental schedule clearly marked as such and, upon receipt, the Administrative Agent will promptly deliver a copy thereof to the Lenders.

Section 12.03 Expenses, Indemnity; Damage Waiver.

(a) The Borrower shall pay (i) all reasonable out-of-pocket expenses incurred by the Administrative Agent, the Arranger and their Affiliates, including, without limitation, the reasonable fees, charges and disbursements of counsel and other outside consultants for the Administrative Agent, the reasonable travel, photocopy, mailing, courier, telephone and other similar expenses, and the cost of environmental invasive and non-invasive assessments and audits and surveys and appraisals, in connection with the syndication of the credit facilities provided for herein, the preparation, negotiation, execution, delivery and administration (both before and after the execution hereof and including advice of counsel to the Administrative Agent as to the rights and duties of the Administrative Agent and the Lenders with respect thereto) of this Agreement and the other Loan Documents and any amendments, modifications or waivers of or consents related to the provisions hereof or thereof (whether or not the transactions contemplated hereby or thereby shall be consummated), (ii) all costs, expenses, Taxes, assessments and other charges incurred by any Agent or any Lender in connection with any filing, registration, recording or perfection of any security interest contemplated by this Agreement or any Security Instrument or any other document referred to therein, (iii) all reasonable out-of-pocket expenses incurred by the Issuing Bank in connection with the issuance, amendment, renewal or extension of any Letter of Credit or any demand for payment thereunder, (iv) all out-of-pocket expenses incurred by the Administrative Agent (and its Affiliates) and the Lenders (including (A) the fees, charges and disbursements of counsel to the Administrative

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Agent and (B) the fees, charges and disbursements of one primary counsel to the Lenders as a group (plus no more than one additional counsel in each jurisdiction that is relevant to such enforcement or protection of rights)) in connection with this Agreement or any other Loan Document or in connection with the Loans made or Letters of Credit issued hereunder, including, without limitation, all such out-of-pocket expenses incurred during any workout, restructuring or negotiations in respect of such Loans or Letters of Credit.

(b) THE BORROWER SHALL INDEMNIFY EACH AGENT, THE ARRANGER, THE ISSUING BANK AND EACH LENDER, AND EACH RELATED PARTY OF ANY OF THE FOREGOING PERSONS (EACH SUCH PERSON BEING CALLED AN “INDEMNITEE”) AGAINST, AND DEFEND AND HOLD EACH INDEMNITEE HARMLESS FROM, ANY AND ALL LOSSES, CLAIMS, DAMAGES, PENALTIES, LIABILITIES AND RELATED EXPENSES, INCLUDING THE REASONABLE AND CUSTOMARY FEES, CHARGES AND DISBURSEMENTS OF ANY COUNSEL FOR ANY INDEMNITEE, INCURRED BY ANY INDEMNITEE (INCLUDING ANY CLAIM, LITIGATION OR PROCEEDING INITIATED BY THE BORROWER, OR ANY OF ITS AFFILIATES) ARISING OUT OF, IN CONNECTION WITH, OR AS A RESULT OF (i) THE EXECUTION OR DELIVERY OF THIS AGREEMENT OR ANY OTHER LOAN DOCUMENT OR ANY AGREEMENT OR INSTRUMENT CONTEMPLATED HEREBY OR THEREBY, THE PERFORMANCE BY THE PARTIES HERETO OR THE PARTIES TO ANY OTHER LOAN DOCUMENT OF THEIR RESPECTIVE OBLIGATIONS HEREUNDER OR THEREUNDER OR THE CONSUMMATION OF THE TRANSACTIONS CONTEMPLATED HEREBY OR BY ANY OTHER LOAN DOCUMENT, (ii) THE FAILURE OF THE BORROWER OR ANY OTHER CREDIT PARTY TO COMPLY WITH THE TERMS OF ANY LOAN DOCUMENT, INCLUDING THIS AGREEMENT, OR WITH ANY GOVERNMENTAL REQUIREMENT, (iii) ANY INACCURACY OF ANY REPRESENTATION OR ANY BREACH OF ANY WARRANTY OR COVENANT OF THE BORROWER OR ANY GUARANTOR SET FORTH IN ANY OF THE LOAN DOCUMENTS OR ANY INSTRUMENTS, DOCUMENTS OR CERTIFICATIONS DELIVERED IN CONNECTION THEREWITH, (iv) ANY LOAN OR LETTER OF CREDIT OR THE USE OF THE PROCEEDS THEREFROM, (v) THE OPERATIONS OF THE BUSINESS OF THE BORROWER AND THE CREDIT PARTIES BY THE BORROWER AND THE CREDIT PARTIES, (vi) ANY ASSERTION THAT THE LENDERS WERE NOT ENTITLED TO RECEIVE THE PROCEEDS RECEIVED PURSUANT TO THE SECURITY INSTRUMENTS, (vii) ANY ENVIRONMENTAL LAW APPLICABLE TO THE BORROWER OR ANY OTHER CREDIT PARTY OR ANY OF THEIR PROPERTIES OR OPERATIONS, INCLUDING, THE PRESENCE, GENERATION, STORAGE, RELEASE, THREATENED RELEASE, USE, TRANSPORT, DISPOSAL, ARRANGEMENT OF DISPOSAL OR TREATMENT OF HAZARDOUS MATERIALS ON OR AT ANY OF THEIR PROPERTIES, (viii) THE BREACH OR NON-COMPLIANCE BY THE BORROWER OR ANY OTHER CREDIT PARTY WITH ANY ENVIRONMENTAL LAW APPLICABLE TO THE BORROWER OR ANY OTHER CREDIT PARTY, (ix) THE PAST OWNERSHIP BY THE BORROWER OR ANY OTHER CREDIT PARTY OF ANY OF THEIR PROPERTIES OR PAST ACTIVITY ON ANY OF THEIR PROPERTIES WHICH, THOUGH LAWFUL AND FULLY PERMISSIBLE AT THE TIME, COULD RESULT IN PRESENT LIABILITY, (x) THE PRESENCE, USE, RELEASE, STORAGE, TREATMENT, DISPOSAL, GENERATION, THREATENED RELEASE, TRANSPORT,

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ARRANGEMENT FOR TRANSPORT OR ARRANGEMENT FOR DISPOSAL OF HAZARDOUS MATERIALS ON OR AT ANY OF THE PROPERTIES OWNED OR OPERATED BY THE BORROWER OR ANY OTHER CREDIT PARTY OR ANY ACTUAL OR ALLEGED PRESENCE OR RELEASE OF HAZARDOUS MATERIALS ON OR FROM ANY PROPERTY OWNED OR OPERATED BY THE BORROWER OR ANY OTHER CREDIT PARTY, (xi) ANY ENVIRONMENTAL LIABILITY RELATED IN ANY WAY TO THE BORROWER OR ANY OTHER CREDIT PARTY, OR (xii) ANY OTHER ENVIRONMENTAL, HEALTH OR SAFETY CONDITION IN CONNECTION WITH THE LOAN DOCUMENTS, OR (xiii) ANY ACTUAL OR PROSPECTIVE CLAIM, LITIGATION, INVESTIGATION OR PROCEEDING RELATING TO ANY OF THE FOREGOING, WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY AND REGARDLESS OF WHETHER ANY INDEMNITEE IS A PARTY THERETO, AND SUCH INDEMNITY SHALL EXTEND TO EACH INDEMNITEE NOTWITHSTANDING THE SOLE OR CONCURRENT NEGLIGENCE OF EVERY KIND OR CHARACTER WHATSOEVER, WHETHER ACTIVE OR PASSIVE, WHETHER AN AFFIRMATIVE ACT OR AN OMISSION, INCLUDING ALL TYPES OF NEGLIGENT CONDUCT IDENTIFIED IN THE RESTATEMENT (SECOND) OF TORTS OF ONE OR MORE OF THE INDEMNITEES OR BY REASON OF STRICT LIABILITY IMPOSED WITHOUT FAULT ON ANY ONE OR MORE OF THE INDEMNITEES; PROVIDED THAT THE INDEMNITY SET FORTH HEREIN SHALL NOT, AS TO ANY INDEMNITEE, BE AVAILABLE TO SUCH INDEMNITEE TO THE EXTENT THAT SUCH LOSSES, CLAIMS, DAMAGES, LIABILITIES OR RELATED EXPENSES ARE DETERMINED BY A COURT OF COMPETENT JURISDICTION TO HAVE RESULTED FROM THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF SUCH INDEMNITEE OR THE BAD FAITH BREACH OF SUCH INDEMNITEE’S OBLIGATIONS HEREUNDER OR UNDER ANY OTHER LOAN DOCUMENT; AND PROVIDED FURTHER THAT THE INDEMNITY SET FORTH HEREIN SHALL NOT APPLY TO DISPUTES BETWEEN LENDERS UNLESS SUCH DISPUTE RESULTS FROM THE EXISTENCE OF A BREACH OF ANY LOAN DOCUMENT BY A CREDIT PARTY. WITH RESPECT TO THE OBLIGATION TO REIMBURSE AN INDEMNITEE FOR FEES, CHARGES AND DISBURSEMENTS OF COUNSEL, EACH INDEMNITEE AGREES THAT ALL INDEMNITEES WILL AS A GROUP UTILIZE ONE PRIMARY COUNSEL (PLUS NO MORE THAN ONE ADDITIONAL COUNSEL IN EACH JURISDICTION WHERE A PROCEEDING THAT IS THE SUBJECT MATTER OF THE INDEMNITY IS LOCATED) UNLESS (1) THERE IS A CONFLICT OF INTEREST AMONG INDEMNITEES, (2) DEFENSES OR CLAIMS EXIST WITH RESPECT TO ONE OR MORE INDEMNITEES THAT ARE NOT AVAILABLE TO ONE OR MORE OTHER INDEMNITEES OR (3) SPECIAL COUNSEL IS REQUIRED TO BE RETAINED AND THE BORROWER CONSENTS TO SUCH RETENTION.

(c) To the extent that the Borrower fails to pay any amount required to be paid by it to the Administrative Agent, the Arranger or the Issuing Bank under Section 12.03(a) or (b), each Lender severally agrees to pay to the Administrative Agent, the Arranger or the Issuing Bank, as the case may be, such Lender’s Applicable Percentage (determined as of the time that the applicable unreimbursed expense or indemnity payment is sought) of such unpaid amount; provided that the unreimbursed expense or indemnified loss, claim, damage, liability

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or related expense, as the case may be, was incurred by or asserted against the Administrative Agent, the Arranger or the Issuing Bank in its capacity as such.

(d) To the extent permitted by applicable law, neither any party hereto nor any of their respective directors, officers, employees and agents shall assert, and each hereby waives, any claim against any other such Person, on any theory of liability, for special, indirect, consequential or punitive damages (as opposed to direct or actual damages) arising out of, in connection with, or as a result of, this Agreement, any other Loan Document or any agreement or instrument contemplated hereby or thereby, the Transactions, any Loan or Letter of Credit or the use of the proceeds thereof.

(e) All amounts due under this Section 12.03 shall be payable promptly after written demand therefor attaching the relevant invoices and/or a certificate, in each case setting forth the basis for such demand in reasonable detail.

Section 12.04 Successors and Assigns.

(a) The provisions of this Agreement shall be binding upon and inure to the benefit of the parties hereto and their respective successors and assigns permitted hereby (including any Affiliate of the Issuing Bank that issues any Letter of Credit), except that (i) the Borrower may not assign or otherwise transfer any of its rights or obligations hereunder without the prior written consent of each Lender (and any attempted assignment or transfer without such consent shall be null and void), (ii) no Lender may assign or otherwise transfer its rights or obligations hereunder except in accordance with this Section 12.04 or as required under Section 5.04 and (iii) no Lender may assign to the Borrower or to an Affiliate of the Borrower all or any portion of such Lender’s rights and obligations under the Agreement or all or any portion of its Commitments or the Loans owing to it hereunder. Nothing in this Agreement, expressed or implied, shall be construed to confer upon any Person (other than the parties hereto, their respective successors and assigns permitted hereby (including any Affiliate of the Issuing Bank that issues any Letter of Credit), Participants (to the extent provided in Section 12.04(c)) and, to the extent expressly contemplated hereby, the Related Parties of each of the Administrative Agent, the Issuing Bank and the Lenders) any legal or equitable right, remedy or claim under or by reason of this Agreement.

(b) (i) Subject to the conditions set forth in Section 12.04(b)(ii), any Lender may assign to one or more assignees all or a portion of its rights and obligations under this Agreement (including all or a portion of its Commitment and the Loans at the time owing to it) with the prior written consent (such consent not to be unreasonably withheld) of:

(A) the Borrower, provided that no consent of the Borrower shall be required if such assignment is to a Lender, an Affiliate of a Lender, an Approved Fund or, if an Event of Default has occurred and is continuing, to any other assignee; and

(B) the Administrative Agent, provided that no consent of the Administrative Agent shall be required for an assignment to an assignee that is a Lender immediately prior to giving effect to such assignment.

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(ii) Assignments shall be subject to the following additional conditions:

(A) except in the case of an assignment to a Lender or an Affiliate of a Lender or an assignment of the entire remaining amount of the assigning Lender’s Commitment or Loans, the amount of the Commitment or Loans of the assigning Lender subject to each such assignment (determined as of the date the Assignment and Assumption with respect to such assignment is delivered to the Administrative Agent) shall not be less than $5,000,000 unless each of the Borrower and the Administrative Agent otherwise consent, provided that no such consent of the Borrower shall be required if an Event of Default has occurred and is continuing;

(B) each partial assignment shall be made as an assignment of a proportionate part of all the assigning Lender’s rights and obligations under this Agreement;

(C) the parties to each assignment shall execute and deliver to the Administrative Agent an Assignment and Assumption, together with a processing and recordation fee of $3,500; and

(D) if the assignee is not a Lender prior to such assignment, it shall deliver to the Administrative Agent an Administrative Questionnaire.

(iii) Subject to Section 12.04(b)(iv) and the acceptance and recording thereof, from and after the effective date specified in each Assignment and Assumption, the assignee thereunder shall be a party hereto and, to the extent of the interest assigned by such Assignment and Assumption, have the rights and obligations of a Lender under this Agreement, and the assigning Lender thereunder shall, to the extent of the interest assigned by such Assignment and Assumption, be released from its obligations under this Agreement (and, in the case of an Assignment and Assumption covering all of the assigning Lender’s rights and obligations under this Agreement, such Lender shall cease to be a party hereto but shall continue to be entitled to the benefits of Section 5.01, Section 5.02, Section 5.03 and Section 12.03 as to events occurring within the stated timeframes and prior to such assignment). Any assignment or transfer by a Lender of rights or obligations under this Agreement that does not comply with this Section 12.04 shall be treated for purposes of this Agreement as a sale by such Lender of a participation in such rights and obligations in accordance with Section 12.04(c).

(iv) The Administrative Agent, acting for this purpose as an agent of the Borrower, shall maintain at one of its offices a copy of each Assignment and Assumption delivered to it and a register for the recordation of the names and addresses of the Lenders, and the Maximum Credit Amount of, and principal amount of the Loans and LC Disbursements owing to, each Lender pursuant to the terms hereof from time to time (the “Register”). The entries in the Register shall be conclusive (absent manifest error), and the Borrower, the Administrative Agent, the Issuing Bank and the Lenders may treat each Person whose name is recorded in the Register pursuant to the terms hereof as a Lender hereunder for all purposes of this Agreement, notwithstanding notice to the contrary. The Register shall be available for inspection by the Borrower, the Issuing Bank and any Lender, at any reasonable time and from time to time upon reasonable prior notice. In connection with any changes to the Register, if

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necessary, the Administrative Agent will reflect the revisions on Annex I and forward a copy of such revised Annex I to the Borrower, the Issuing Bank and each Lender.

(v) Upon its receipt of a duly completed Assignment and Assumption executed by an assigning Lender and an assignee, the assignee’s completed Administrative Questionnaire (unless the assignee shall already be a Lender hereunder), the processing and recordation fee referred to in Section 12.04(b) and any written consent to such assignment required by Section 12.04(b), the Administrative Agent shall accept such Assignment and Assumption and record the information contained therein in the Register. No assignment shall be effective for purposes of this Agreement unless it has been recorded in the Register as provided in this Section 12.04(b).

(c)

(i) Any Lender may, without the consent of the Borrower, the Administrative Agent or the Issuing Bank, sell participations to one or more banks or other entities (a “Participant”) in all or a portion of such Lender’s rights and obligations under this Agreement (including all or a portion of its Commitment and the Loans owing to it); provided that (A) such Lender’s obligations under this Agreement shall remain unchanged, (B) such Lender shall remain solely responsible to the other parties hereto for the performance of such obligations and (C) the Borrower, the Administrative Agent, the Issuing Bank and the other Lenders shall continue to deal solely and directly with such Lender in connection with such Lender’s rights and obligations under this Agreement. Any agreement or instrument pursuant to which a Lender sells such a participation shall provide that such Lender shall retain the sole right to enforce this Agreement and to approve any amendment, modification or waiver of any provision of this Agreement; provided that such agreement or instrument may provide that such Lender will not, without the consent of the Participant, agree to any amendment, modification or waiver described in the first proviso to Section 12.02(b) that affects such Participant. In addition, each agreement or instrument creating any participation must include an agreement by the Participant to be bound by the provisions of Section 12.11. Subject to Section 12.04(c)(ii), the Borrower agrees that each Participant shall be entitled to the benefits of Section 5.01 and Section 5.03 to the same extent as if it were a Lender and had acquired its interest by assignment pursuant to Section 12.04(a).

(ii) A Participant shall not be entitled to receive any greater payment under Section 5.01 or Section 5.03 than the applicable Lender would have been entitled to receive with respect to the participation sold to such Participant, unless the sale of the participation to such Participant is made with the Borrower’s prior written consent. The Borrower shall be notified of each participation sold to a Participant, and each Participant shall comply with Sections 5.03(e) and 5.03(f) as though it were a Lender. A Participant that fails to comply with the preceding sentence shall not be entitled to any of the benefits of Section 5.03.

(d) Any Lender may at any time pledge or assign a security interest in all or any portion of its rights under this Agreement to secure obligations of such Lender, including, without limitation, any pledge or assignment to secure obligations to a Federal Reserve Bank, and this Section 12.04(d) shall not apply to any such pledge or assignment of a security interest; provided that no such pledge or assignment of a security interest shall release a Lender

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from any of its obligations hereunder or substitute any such pledgee or assignee for such Lender as a party hereto.

(e) Notwithstanding any other provisions of this Section 12.04, no transfer or assignment of the interests or obligations of any Lender or any grant of participations therein shall be permitted if such transfer, assignment or grant would require the Borrower or any of the Guarantors to file a registration statement with the SEC or to qualify the Loans under the “Blue Sky” laws of any state.

Section 12.05 Survival; Revival; Reinstatement.

(a) All covenants, agreements, representations and warranties made by any Credit Party herein and in the certificates or other instruments delivered in connection with or pursuant to this Agreement or any other Loan Document shall be considered to have been relied upon by the other parties hereto and shall survive the execution and delivery of this Agreement and the making of any Loans and issuance of any Letters of Credit, regardless of any investigation made by any such other party or on its behalf and notwithstanding that the Administrative Agent, the Issuing Bank or any Lender may have had notice or knowledge of any Default or incorrect representation or warranty at the time any credit is extended hereunder, and shall continue in full force and effect as long as the principal of or any accrued interest on any Loan or any fee or any other amount payable under this Agreement is outstanding and unpaid or any Letter of Credit is outstanding and so long as the Commitments have not expired or terminated. The provisions of Section 5.01, Section 5.02, Section 5.03 and Section 12.03 and Article XI shall survive and remain in full force and effect regardless of the consummation of the transactions contemplated hereby, the repayment of the Loans, the expiration or termination of the Letters of Credit and the Commitments or the termination of this Agreement, any other Loan Document or any provision hereof or thereof.

(b) To the extent that any payments on the Obligations or proceeds of any collateral are subsequently invalidated, declared to be fraudulent or preferential, set aside or required to be repaid to a trustee, debtor in possession, receiver or other Person under any bankruptcy law, common law or equitable cause, then to such extent, the Obligations so satisfied shall be revived and continue as if such payment or proceeds had not been received and the Administrative Agent’s and the Lenders’ Liens, security interests, rights, powers and remedies under this Agreement and each Loan Document shall continue in full force and effect. In such event, each Loan Document shall be automatically reinstated and each Credit Party shall take such action as may be reasonably requested by the Administrative Agent and the Lenders to effect such reinstatement.

Section 12.06 Counterparts; Integration; Effectiveness.

(a) This Agreement may be executed in counterparts (and by different parties hereto on different counterparts), each of which shall constitute an original, but all of which when taken together shall constitute a single contract.

(b) This Agreement, the other Loan Documents and any separate letter agreements with respect to fees payable to the Administrative Agent constitute the entire

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contract among the parties relating to the subject matter hereof and thereof and supersede any and all previous agreements and understandings, oral or written, relating to the subject matter hereof and thereof. THIS AGREEMENT AND THE OTHER LOAN DOCUMENTS REPRESENT THE FINAL AGREEMENT AMONG THE PARTIES HERETO AND THERETO AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

(c) Except as provided in Section 6.01, this Agreement shall become effective when it shall have been executed by the Administrative Agent and when the Administrative Agent shall have received counterparts hereof which, when taken together, bear the signatures of each of the other parties hereto, and thereafter shall be binding upon and inure to the benefit of the parties hereto and their respective successors and permitted assigns. Delivery of an executed counterpart of a signature page of this Agreement by telecopy shall be effective as delivery of a manually executed counterpart of this Agreement.

Section 12.07 Severability. Any provision of this Agreement or any other Loan Document held to be invalid, illegal or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such invalidity, illegality or unenforceability without affecting the validity, legality and enforceability of the remaining provisions hereof or thereof; and the invalidity of a particular provision in a particular jurisdiction shall not invalidate such provision in any other jurisdiction.

Section 12.08 Right of Setoff. If an Event of Default shall have occurred and be continuing, each Lender is hereby authorized at any time and from time to time, to the fullest extent permitted by law, to set off and apply any and all deposits (general or special, time or demand, provisional or final) at any time held and other obligations (of whatsoever kind, including, without limitations obligations under Hedge Agreements) at any time owing by such Lender to or for the credit or the account of the Borrower or any other Credit Party against any of and all the obligations of the Borrower or any other Credit Party owed to such Lender now or hereafter existing under this Agreement or any other Loan Document, irrespective of whether or not such Lender shall have made any demand under this Agreement or any other Loan Document and although such obligations may be unmatured. Each Lender agrees to promptly notify the Borrower and the Administrative Agent after any such setoff and application, provided that the failure to give such notice shall not affect the validity of such setoff and application. The rights of each Lender under this Section 12.08 are in addition to other rights and remedies (including other rights of setoff) which such Lender may have.

Section 12.09 GOVERNING LAW; JURISDICTION; CONSENT TO SERVICE OF PROCESS.

(a) THIS AGREEMENT AND THE NOTES SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF TEXAS EXCEPT TO THE EXTENT THAT UNITED STATES FEDERAL LAW PERMITS ANY LENDER TO CONTRACT FOR, CHARGE, RECEIVE, RESERVE OR TAKE INTEREST AT THE RATE ALLOWED BY THE LAWS OF THE STATE WHERE SUCH LENDER IS

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LOCATED. CHAPTER 346 OF THE TEXAS FINANCE CODE (WHICH REGULATES CERTAIN REVOLVING CREDIT LOAN ACCOUNTS AND REVOLVING TRI-PARTY ACCOUNTS) SHALL NOT APPLY TO THIS AGREEMENT OR THE NOTES.

(b) ANY LEGAL ACTION OR PROCEEDING WITH RESPECT TO THE LOAN DOCUMENTS SHALL BE BROUGHT IN THE COURTS OF THE STATE OF TEXAS OR OF THE UNITED STATES OF AMERICA FOR THE SOUTHERN DISTRICT OF TEXAS, AND, BY EXECUTION AND DELIVERY OF THIS AGREEMENT, EACH PARTY HEREBY ACCEPTS FOR ITSELF AND (TO THE EXTENT PERMITTED BY LAW) IN RESPECT OF ITS PROPERTY, GENERALLY AND UNCONDITIONALLY, THE JURISDICTION OF THE AFORESAID COURTS. EACH PARTY HEREBY IRREVOCABLY WAIVES ANY OBJECTION, INCLUDING, WITHOUT LIMITATION, ANY OBJECTION TO THE LAYING OF VENUE OR BASED ON THE GROUNDS OF FORUM NON CONVENIENS, WHICH IT MAY NOW OR HEREAFTER HAVE TO THE BRINGING OF ANY SUCH ACTION OR PROCEEDING IN SUCH RESPECTIVE JURISDICTIONS. THIS SUBMISSION TO JURISDICTION IS NON-EXCLUSIVE AND DOES NOT PRECLUDE A PARTY FROM OBTAINING JURISDICTION OVER ANOTHER PARTY IN ANY COURT OTHERWISE HAVING JURISDICTION.

(c) EACH PARTY IRREVOCABLY CONSENTS TO THE SERVICE OF PROCESS OF ANY OF THE AFOREMENTIONED COURTS IN ANY SUCH ACTION OR PROCEEDING BY THE MAILING OF COPIES THEREOF BY REGISTERED OR CERTIFIED MAIL, POSTAGE PREPAID, TO IT AT THE ADDRESS SPECIFIED IN SECTION 12.01 OR SUCH OTHER ADDRESS AS IS SPECIFIED PURSUANT TO SECTION 12.01 (OR ITS ASSIGNMENT AND ASSUMPTION), SUCH SERVICE TO BECOME EFFECTIVE THIRTY (30) DAYS AFTER SUCH MAILING. NOTHING HEREIN SHALL AFFECT THE RIGHT OF A PARTY OR ANY HOLDER OF A NOTE TO SERVE PROCESS IN ANY OTHER MANNER PERMITTED BY LAW OR TO COMMENCE LEGAL PROCEEDINGS OR OTHERWISE PROCEED AGAINST ANOTHER PARTY IN ANY OTHER JURISDICTION.

(d) EACH PARTY HEREBY (i) IRREVOCABLY AND UNCONDITIONALLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY LAW, TRIAL BY JURY IN ANY LEGAL ACTION OR PROCEEDING RELATING TO THIS AGREEMENT OR ANY OTHER LOAN DOCUMENT AND FOR ANY COUNTERCLAIM THEREIN; (ii) IRREVOCABLY WAIVES, TO THE MAXIMUM EXTENT NOT PROHIBITED BY LAW, ANY RIGHT IT MAY HAVE TO CLAIM OR RECOVER IN ANY SUCH LITIGATION ANY SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES, OR DAMAGES OTHER THAN, OR IN ADDITION TO, ACTUAL DAMAGES; (iii) CERTIFIES THAT NO PARTY HERETO NOR ANY REPRESENTATIVE OR AGENT OF COUNSEL FOR ANY PARTY HERETO HAS REPRESENTED, EXPRESSLY OR OTHERWISE, OR IMPLIED THAT SUCH PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVERS, AND (iv) ACKNOWLEDGES THAT IT HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT, THE LOAN DOCUMENTS AND THE TRANSACTIONS CONTEMPLATED HEREBY AND THEREBY BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS CONTAINED IN THIS SECTION 12.09.

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Section 12.10 Headings. Article and Section headings and the Table of Contents used herein are for convenience of reference only, are not part of this Agreement and shall not affect the construction of, or be taken into consideration in interpreting, this Agreement.

Section 12.11 Confidentiality. Each of the Administrative Agent, the Issuing Bank and the Lenders agrees to maintain the confidentiality of the Information (as defined below), except that Information may be disclosed (a) to its and its Affiliates’ directors, officers, employees and agents, including accountants, legal counsel and other advisors (it being understood that the Persons to whom such disclosure is made will be informed of the confidential nature of such Information and instructed to keep such Information confidential), (b) to the extent requested by any regulatory authority (and in connection therewith, to the extent permitted by applicable law or such regulatory authority, the disclosing Person agrees to inform the Borrower of such disclosure or pending disclosure), (c) to the extent required by applicable laws or regulations or by any subpoena or similar legal process (and in connection therewith, to the extent permitted by applicable law or such legal process, the disclosing Person agrees to inform the Borrower of such disclosure or pending disclosure), (d) to any other party to this Agreement or any other Loan Document, (e) in connection with the exercise of any remedies hereunder or under any other Loan Document or any suit, action or proceeding relating to this Agreement or any other Loan Document or the enforcement of rights hereunder or thereunder, (f) subject to an agreement containing provisions substantially the same as those of this Section 12.11, to (i) any assignee of or Participant in, or any prospective assignee of or Participant in, any of its rights or obligations under this Agreement, (ii) any actual or prospective counterparty (or its advisors) to any Hedge Agreement relating to any Credit Party and its obligations or (iii) any credit insurance provider relating to the Borrower and its obligations under the Loan Documents, (g) with the consent of the Borrower or (h) to the extent such Information (i) becomes publicly available other than as a result of a breach of this Section 12.11 or (ii) becomes available to the Administrative Agent, the Issuing Bank or any Lender on a nonconfidential basis from a source other than the Borrower or any Credit Party. For the purposes of this Section 12.11, “Information” means all information received from the Borrower or any Subsidiary relating to the Borrower or any Subsidiary or the business of the Borrower or any Subsidiary, other than any such information that is available to the Administrative Agent, the Issuing Bank or any Lender on a nonconfidential basis prior to disclosure by the Borrower or any Subsidiary. Any Person required to maintain the confidentiality of Information as provided in this Section 12.11 shall be considered to have complied with its obligation to do so if such Person has exercised the same degree of care to maintain the confidentiality of such Information as such Person would accord to its own confidential information.

Section 12.12 Interest Rate Limitation. It is the intention of the parties hereto that each Lender shall conform strictly to usury laws applicable to it. Accordingly, if the transactions contemplated hereby would be usurious as to any Lender under laws applicable to it (including the laws of the United States of America and the State of Texas or any other jurisdiction whose laws may be mandatorily applicable to such Lender notwithstanding the other provisions of this Agreement), then, in that event, notwithstanding anything to the contrary in any of the Loan Documents or any agreement entered into in connection with or as security for the Notes, it is agreed as follows: (i) the aggregate of all consideration which constitutes interest under law applicable to any Lender that is contracted for, taken, reserved, charged or received by such Lender under any of the Loan Documents or agreements or otherwise in connection with the

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Notes shall under no circumstances exceed the maximum amount allowed by such applicable law, and any excess shall be canceled automatically and if theretofore paid shall be credited by such Lender on the principal amount of the Obligations (or, to the extent that the principal amount of the Obligations shall have been or would thereby be paid in full (other than indemnities and other contingent obligations not then due and payable and as to which no claim has been made as of the time of determination), refunded by such Lender to the Borrower); and (ii) in the event that the maturity of the Notes is accelerated by reason of an election of the holder thereof resulting from any Event of Default under this Agreement or otherwise, or in the event of any required or permitted prepayment, then such consideration that constitutes interest under law applicable to any Lender may never include more than the maximum amount allowed by such applicable law, and excess interest, if any, provided for in this Agreement or otherwise shall be canceled automatically by such Lender as of the date of such acceleration or prepayment and, if theretofore paid, shall be credited by such Lender on the principal amount of the Obligations (or, to the extent that the principal amount of the Obligations shall have been or would thereby be paid in full (other than indemnities and other contingent obligations not then due and payable and as to which no claim has been made as of the time of determination), refunded by such Lender to the Borrower). All sums paid or agreed to be paid to any Lender for the use, forbearance or detention of sums due hereunder shall, to the extent permitted by law applicable to such Lender, be amortized, prorated, allocated and spread throughout the stated term of the Loans evidenced by the Notes until payment in full so that the rate or amount of interest on account of any Loans hereunder does not exceed the maximum amount allowed by such applicable law. If at any time and from time to time (i) the amount of interest payable to any Lender on any date shall be computed at the Highest Lawful Rate applicable to such Lender pursuant to this Section 12.12 and (ii) in respect of any subsequent interest computation period the amount of interest otherwise payable to such Lender would be less than the amount of interest payable to such Lender computed at the Highest Lawful Rate applicable to such Lender, then the amount of interest payable to such Lender in respect of such subsequent interest computation period shall continue to be computed at the Highest Lawful Rate applicable to such Lender until the total amount of interest payable to such Lender shall equal the total amount of interest which would have been payable to such Lender if the total amount of interest had been computed without giving effect to this Section 12.12. To the extent that Chapter 303 of the Texas Finance Code is relevant for the purpose of determining the Highest Lawful Rate applicable to a Lender, such Lender elects to determine the applicable rate ceiling under such Chapter by the weekly ceiling from time to time in effect. Chapter 346 of the Texas Finance Code does not apply to the Borrower’s obligations hereunder.

Section 12.13 Collateral Matters; Hedge Agreements. The benefit of the Security Instruments and of the provisions of this Agreement relating to any collateral securing the Obligations shall also extend to and be available on a pro rata basis to Hedge Banks in respect of any Obligations of the type described in clause (b) of the definition thereof (after giving effect to all netting arrangements relating to the Hedge Agreements giving rise to such Obligations) and to the Lenders and their respective Affiliates in respect of any Obligations of the type described in clause (c) of the definition thereof. Except as set forth in Section 12.02(b)(7), no Person shall have any voting rights under any Loan Document as a result of the existence of obligations owed to it under any Hedge Agreements or any Treasury Management Agreements.

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Section 12.14 No Third Party Beneficiaries. This Agreement and the other Loan Documents, and the agreement of the Lenders to make Loans and the Issuing Bank to issue, amend, renew or extend Letters of Credit hereunder, are solely for the benefit of the Borrower, and no other Person (including, without limitation, any contractor, subcontractor, supplier or materialsman) shall have any rights, claims, remedies or privileges hereunder or under any other Loan Document against the Administrative Agent, any other Agent, the Issuing Bank or any Lender for any reason whatsoever. There are no third party beneficiaries.

Section 12.15 USA Patriot Act Notice. Each Lender hereby notifies the Borrower that pursuant to the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)) (the “Act”), it is required to obtain, verify and record information that identifies the Borrower, which information includes the name and address of the Borrower and other information that will allow such Lender to identify the Borrower in accordance with the Act.

Section 12.16 EXCULPATION PROVISIONS. EACH OF THE PARTIES HERETO SPECIFICALLY AGREES THAT IT HAS A DUTY TO READ THIS AGREEMENT AND THE OTHER LOAN DOCUMENTS AND AGREES THAT IT IS CHARGED WITH NOTICE AND KNOWLEDGE OF THE TERMS OF THIS AGREEMENT AND THE OTHER LOAN DOCUMENTS; THAT IT HAS IN FACT READ THIS AGREEMENT AND IS FULLY INFORMED AND HAS FULL NOTICE AND KNOWLEDGE OF THE TERMS, CONDITIONS AND EFFECTS OF THIS AGREEMENT; THAT IT HAS BEEN REPRESENTED BY INDEPENDENT LEGAL COUNSEL OF ITS CHOICE THROUGHOUT THE NEGOTIATIONS PRECEDING ITS EXECUTION OF THIS AGREEMENT AND THE OTHER LOAN DOCUMENTS; AND HAS RECEIVED THE ADVICE OF ITS ATTORNEY IN ENTERING INTO THIS AGREEMENT AND THE OTHER LOAN DOCUMENTS; AND THAT IT RECOGNIZES THAT CERTAIN OF THE TERMS OF THIS AGREEMENT AND THE OTHER LOAN DOCUMENTS RESULT IN ONE PARTY ASSUMING THE LIABILITY INHERENT IN SOME ASPECTS OF THE TRANSACTION AND RELIEVING THE OTHER PARTY OF ITS RESPONSIBILITY FOR SUCH LIABILITY. EACH PARTY HERETO AGREES AND COVENANTS THAT IT WILL NOT CONTEST THE VALIDITY OR ENFORCEABILITY OF ANY EXCULPATORY PROVISION OF THIS AGREEMENT AND THE OTHER LOAN DOCUMENTS ON THE BASIS THAT THE PARTY HAD NO NOTICE OR KNOWLEDGE OF SUCH PROVISION OR THAT THE PROVISION IS NOT “CONSPICUOUS.”

[SIGNATURES BEGIN NEXT PAGE]

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The parties hereto have caused this Agreement to be duly executed as of the day and year first above written.

BORROWER:

CARRIZO OIL & GAS, INC.

By:

/s/ Xxxx X. Xxxxxx

Xxxx X. Xxxxxx

Chief Financial Officer, Vice President,

Secretary and Treasurer

[Signature Page- Credit Agreement]

Index

ADMINISTRATIVE AGENT:

BNP PARIBAS

By:

/s/ Xxxx Xxxxxxxx

Name: Xxxx Xxxxxxxx

Title:

Director

By:

/s/ Xxxxx Xxxxxx

Name: Xxxxx Xxxxxx

Title:

Director

[Signature Page- Credit Agreement]

Index

CO-SYNDICATION AGENTS:

CREDIT AGRICOLE CORPORATE AND

INVESTMENT BANK, as Co-Syndication Agent

By:

/s/ Xxx Xxxxxxxx

Name: Xxx Xxxxxxxx

Title:

Managing Director

By:

/s/ Xxxxxxx Xxxxx

Name: Xxxxxxx Xxxxx

Title:

Director

[Signature Page- Credit Agreement]

Index

ROYAL BANK OF CANADA, as Co-Syndication Agent

By:

/s/ Xxxxx Xxxx

Name: Xxxxx Xxxx

Title:

Authorized Signatory

[Signature Page- Credit Agreement]

Index

CO-DOCUMENTATION AGENTS:

CAPITAL ONE, N.A., as Co-Documentation Agent

By:

/s/ Xxxx Xxxxxxxxx

Name: Xxxx Xxxxxxxxx

Title:

Senior Vice President

[Signature Page- Credit Agreement]

Index

COMPASS BANK, as Co-Documentation Agent

By:

/s/ Xxxxxxxx X. Xxxxx

Name: Xxxxxxxx X. Xxxxx

Title:

Senior Vice President

[Signature Page- Credit Agreement]

Index

LENDERS:

BNP PARIBAS, as a Lender

By:

/s/ Xxxx Xxxxxxxx

Name: Xxxx Xxxxxxxx

Title:

Director

By:

/s/ Xxxxx Xxxxxx

Name: Xxxxx Xxxxxx

Title:

Director

[Signature Page- Credit Agreement]

Index

CO-SYNDICATION AGENTS:

CREDIT AGRICOLE CORPORATE AND

INVESTMENT BANK, as a Lender

By:

/s/ Xxx Xxxxxxxx

Name: Xxx Xxxxxxxx

Title:

Managing Director

By:

/s/ Xxxxxxx Xxxxx

Name: Xxxxxxx Xxxxx

Title:

Director

[Signature Page- Credit Agreement]

Index

ROYAL BANK OF CANADA, as a Lender

By:

/s/ Xxxxx Xxxx

Name: Xxxxx Xxxx

Title:

Authorized Signatory

[Signature Page- Credit Agreement]

Index

CAPITAL ONE, N.A., as a Lender

By:

/s/ Xxxx Xxxxxxxxx

Name: Xxxx Xxxxxxxxx

Title:

Senior Vice President

[Signature Page- Credit Agreement]

Index

COMPASS BANK, as a Lender

By:

/s/ Xxxxxxxx X. Xxxxx

Name: Xxxxxxxx X. Xxxxx

Title:

Senior Vice President

[Signature Page- Credit Agreement]

Index

REGIONS BANK, as a Lender

By: /s/ Xxxxx X. Xxxxxx III

Name: Xxxxx X. Xxxxxx III

Title:

Senior Vice President

[Signature Page- Credit Agreement]

Index

UNION BANK, N.A. , as a Lender

By: /s/ Xxxxxx Xxxxxxxxx

Name: Xxxxxx Xxxxxxxxx

Title:

Senior Vice President

[Signature Page- Credit Agreement]

Index

SOCIETE GENERALE, as a Lender

By: /s/ Xxxxx X. Xxxxxxxxx

Name: Xxxxx X. Xxxxxxxxx

Title:

Director

[Signature Page- Credit Agreement]

Index

CREDIT SUISSE AG, CAYMAN ISLANDS

BRANCH, as a Lender

By:

/s/ Xxxxxx Xxxx

Name: Xxxxxx Xxxx

Title:

Managing Director

By:

/s/ Xxxxx Xxxxxx

Name: Xxxxx Xxxxxx

Title:

Associate

[Signature Page- Credit Agreement]

Index

ANNEX I

LIST OF MAXIMUM CREDIT AMOUNTS

Name of Lender	Applicable Percentage	Maximum Credit Amount
BNP Paribas	13.1%	$ 98,571,428.57
Credit Agricole Corporate and Investment Bank	12.6%	$ 94,285,714.29
Royal Bank of Canada	12.6%	$ 94,285,714.29
Capital One, N.A.	12.6%	$ 94,285,714.29
Compass Bank	12.6%	$ 94,285,714.29
Regions Bank	9.1%	$ 68,571,428.57
Union Bank, N.A.	9.1%	$ 68,571,428.57
Societe Generale	9.1%	$ 68,571,428.57
Credit Suisse AG, Cayman Islands Branch	9.1%	$ 68,571,428.57

TOTAL	100.00%	$750,000,000.00

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CREDIT AGREEMENT dated as of January 27, 2011 among CARRIZO OIL & GAS, INC., as Borrower, BNP PARIBAS, as Administrative Agent, CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK and ROYAL BANK OF CANADA, as Co-Syndication Agents, CAPITAL ONE, N.A. and...

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CREDIT AGREEMENT dated as of January 27, 2011 among CARRIZO OIL & GAS, INC., as Borrower, BNP PARIBAS, as Administrative Agent, CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK and ROYAL BANK OF CANADA, as Co-Syndication Agents, CAPITAL ONE, N.A. and...

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