Common use of Capitalization and Valid Issuance of Purchased Units Clause in Contracts

Capitalization and Valid Issuance of Purchased Units. (a) As of the Commitment Date, the issued and outstanding limited partner interests of MarkWest consist of 3,997,502 Common Units and 3,000,000 Subordinated Units. The only issued and outstanding general partner interests of MarkWest are the interests of the General Partner described in the Partnership Agreement. All outstanding Common Units and Subordinated Units and the limited partner interests represented thereby have been duly authorized and validly issued in accordance with the Partnership Agreement and are fully paid (to the extent required under the Partnership Agreement) and nonassessable (except as such nonassessability may be affected by matters described under the caption “The Partnership Agreement—Limited Liability” in MarkWest’s registration statement on Form S-1 (No. 333-81780) which is incorporated by reference into the Partnership’s Registration Statement on Form 8-A (File No. 001-31239) (the “Form 8-A”)).

Capitalization and Valid Issuance of Purchased Units. (a) As of the Commitment Datedate hereof, the issued and outstanding limited partner interests of MarkWest consist of 3,997,502 8,242,697 Common Units and 3,000,000 2,400,000 Subordinated Units. The only issued and outstanding general partner interests of MarkWest are the interests of the General Partner described in the Partnership Agreement. All outstanding Common Units and Subordinated Units and the limited partner interests represented thereby have been duly authorized and validly issued in accordance with the Partnership Agreement and are fully paid (to the extent required under the Partnership Agreement) and nonassessable (except as such nonassessability may be affected by matters described under the caption “The Partnership Agreement—Limited Liability” in MarkWest’s registration statement on Form S-1 (No. 333-81780) which is incorporated by reference into the Partnership’s Registration Statement on Form 8-A (File No. 001-31239) (the “Form 8-A”)).

Capitalization and Valid Issuance of Purchased Units. (a) As of the Commitment Datedate hereof, the issued and outstanding limited partner interests of MarkWest consist of 3,997,502 36,500,445 Common Units and 3,000,000 Subordinated Units. The only issued and outstanding general partner interests of MarkWest are the interests of the General Partner described and as defined in the Partnership Agreement. All outstanding Common Units and Subordinated Units and the limited partner interests represented thereby have been duly authorized and validly issued in accordance with the Partnership Agreement and are fully paid (to the extent required under the Partnership Agreement) and nonassessable (except as such nonassessability may be affected by matters described under the caption “The Partnership Agreement—-Limited Liability” in MarkWest’s registration statement on Form S-1 (No. 333-81780) which is incorporated by reference into the Partnership’s Registration Statement on Form 8-A (File No. 001-31239) (the “Form 8-A”)).