Rule 153 definition

Rule 153. “Rule 158”, “Rule 163”, “Rule 164”, “Rule 172”, “Rule 405”, “Rule 415”, “Rule 424”, “Rule 430B”, “Rule 433” “Rule 456”, “Rule 457” and “Rule 462(b)” refer to such rules under the Act.

Rule 153. “Rule 158”, “Rule 163”, “Rule 164”, “Rule 172”, “Rule 405”, “Rule 415”, “Rule 424”, “Rule 430B” and “Rule 433” refer to such rules under the Securities Act.

Rule 153. “Rule 164,” “Rule 172,” “Rule 405,” “Rule 415,” “Rule 424,” “Rule 424(b),” “Rule 430B,” and “Rule 433” refer to such rules under the Securities Act Regulations. All references in this Agreement to financial statements and schedules and other information that is “contained,” “included” or “stated” in the Registration Statement or the Prospectus (and all other references of like import) shall be deemed to mean and include all such financial statements and schedules and other information that is incorporated by reference in the Registration Statement or the Prospectus, as the case may be. All references in this Agreement to the Registration Statement, the Prospectus or any amendment or supplement to any of the foregoing shall be deemed to include the copy filed with the Commission pursuant to EXXXX; all references in this Agreement to any Issuer Free Writing Prospectus (other than any Issuer Free Writing Prospectuses that, pursuant to Rule 433, are not required to be filed with the Commission) shall be deemed to include the copy thereof filed with the Commission pursuant to EXXXX; and all references in this Agreement to “supplements” to the Prospectus shall include, without limitation, any supplements, “wrappers” or similar materials prepared in connection with any offering, sale or private placement of any Placement Shares by Univest outside of the United States. If the foregoing correctly sets forth the understanding between the Company and Univest, please so indicate in the space provided below for that purpose, whereupon this letter shall constitute a binding agreement between the Company and Univest. Very truly yours, HOUSTON AMERICAN ENERGY CORP. By: /s/ Jxxx Xxxxxxxxxxx Name: Jxxx Xxxxxxxxxxx Title: Chief Executive Officer ACCEPTED as of the date first-above written: UNIVEST SECURITIES, LLC By: /s/ Exxxx Yx Xxx Name: Exxxx Yx Xxx Title: COO and Head of Investment Banking

Examples of Rule 153 in a sentence

• During any period in which a prospectus relating to Shares is required to be delivered by the Sales Agent under the Act with respect to a pending sale of Shares (including in circumstances where such requirement may be satisfied pursuant to Rule 153 or Rule 172 under the Act), the Company will use its commercially reasonable efforts to cause the Shares to be listed on Nasdaq and the CSE.

• All Material Transactions falling within the scope of Section 188 (1) of the Companies Act 2013 and the values of which are in excess of the threshold limits specified in Rule 15(3), would require approval of the shareholders, based on recommendation of the Board, through special resolution passed at the general meeting.

• This prospectus delivery requirement may be satisfied through the facilities of the NASDAQ Global Select Market in accordance with Rule 153 under the Securities Act.

• During any period in which a prospectus relating to the Shares is required to be delivered by the Sales Agent under the Act with respect to a pending sale of the Shares (including in circumstances where such requirement may be satisfied pursuant to Rule 153 or Rule 172 under the Act), the Company will use its commercially reasonable efforts to cause the Shares to be listed on Nasdaq and the CSE.

• The Board will approve all RPTs which are not at arm’s length and / or which are not in the ordinary course of business, but are within the threshold limits specified in Rule 15(3) of the Companies (Meetings of Board and its Powers) Rules 2014.

More Definitions of Rule 153

Rule 153. “Rule 158”, “Rule 163”, “Rule 164”, “Rule 172”, “Rule 174”, “Rule 405”, “Rule 415”, “Rule 424”, “Rule 430B” “Rule 433” and “Rule 456” refer to such rules under the Securities Act. If the foregoing is in accordance with your understanding of our agreement, please sign and return to us the enclosed duplicate hereof, whereupon this letter and your acceptance shall represent a binding agreement among the Transaction Entities and the Manager. Very truly yours, DIGITAL REALTY TRUST, INC. By: /s/ A. Xxxxxxx Xxxxx Name: A. Xxxxxxx Xxxxx Title: Chief Financial Officer and Chief Investment Officer DIGITAL REALTY TRUST, L.P. By: Digital Realty Trust, Inc., its general partner By: /s/ A. Xxxxxxx Xxxxx Name: A. Xxxxxxx Xxxxx Title: Chief Financial Officer and Chief Investment Officer The foregoing Agreement is hereby confirmed and accepted as of the date first written above. CITIGROUP GLOBAL MARKETS INC. By: /s/ Xxxxxx Xxxxx Name: Xxxxxx Xxxxx Title: Vice President SCHEDULE I Schedule of Free Writing Prospectuses included in the Disclosure Package None. SCHEDULE II Subsidiaries Name Jurisdiction of Formation/Incorporation Foreign Qualifications Digital Printers Square, LLC Delaware Illinois 200 Xxxx, LLC Delaware California Digital Xxxxxxx XX, LLC Delaware Virginia Digital Network Services, LLC Delaware Arizona Digital Lakeside, LLC Delaware Illinois GIP 7th Street, LLC Delaware California SCHEDULE III

Rule 153. “Rule 158”, “Rule 163”, “Rule 164”, “Rule 172”, “Rule 405”, “Rule 415”, “Rule 424”, “Rule 430B”, “Rule 433”, “Rule 456”, “Rule 457” and “Rule 462” refer to such rules under the Securities Act.

Rule 153. “Rule 158”, “Rule 163”, “Rule 164”, “Rule 172”, “Rule 405”, “Rule 415”, “Rule 424”, “Rule 430B” “Rule 433”, “Rule 456” and “Rule 457” refer to such rules under the Act. If the foregoing is in accordance with your understanding of our agreement, please sign and return to us the enclosed duplicate hereof, whereupon this letter and your acceptance shall represent a binding agreement among the Transaction Entities and the Manager. Very truly yours, LIBERTY PROPERTY TRUST By: /s/ Xxxxxxx X. Xxxxxxxxx Name: Xxxxxxx X. Xxxxxxxxx Title: President and Chief Executive Officer LIBERTY PROPERTY LIMITED PARTNERSHIP By: Liberty Property Trust, its general partner By: /s/ Xxxxxxx X. Xxxxxxxxx Name: Xxxxxxx X. Xxxxxxxxx Title: President and Chief Executive Officer The foregoing Agreement is hereby confirmed and accepted as of the date first written above. UBS SECURITIES LLC By: /s/ Xxxxxxx X. Xxx Name: Xxxxxxx X. Xxx Title: MD By: /s/ Xxxxxxx Xxxxx Ropa Name: Xxxxxxx Xxxxx Ropa Title: Associate Director SCHEDULE I Schedule of Free Writing Prospectuses included in the Disclosure Package SCHEDULE II

Rule 153. “Rule 158”, “Rule 163”, “Rule 164”, “Rule 172”, “Rule 405”, “Rule 415”, “Rule 424”, “Rule 430B” “Rule 433”, “Rule 456” and “Rule 457” refer to such rules under the Act. If the foregoing is in accordance with your understanding of our agreement, please sign and return to us the enclosed duplicate hereof, whereupon this letter and your acceptance shall represent a binding agreement among the Transaction Entities and the Manager. Very truly yours, By: /s/ Xxxxxxx X. Xxxxxxxxx Name: Xxxxxxx X. Xxxxxxxxx Title: President and Chief Executive Officer LIBERTY PROPERTY LIMITED PARTNERSHIP By: Liberty Property Trust, its general partner By: /s/ Xxxxxxx X. Xxxxxxxxx Name: Xxxxxxx X. Xxxxxxxxx Title: President and Chief Executive Officer The foregoing Agreement is hereby confirmed and accepted as of the date first written above. Citigroup Global Markets Inc. By: Citigroup Global Markets Inc. By: /s/ Xxxx Xxxxxxxxxxx Name: Xxxx Xxxxxxxxxxx Title: Director SCHEDULE I Schedule of Free Writing Prospectuses included in the Disclosure Package SCHEDULE II