High Island Offshore System, L.L.C.

Third Revised Volume No. 1

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Effective Date: 11/01/2007, Docket: RP08- 55-000, Status: Effective

Original Sheet No. 241 Original Sheet No. 241 : Effective

FORM OF RESERVE COMMITMENT AGREEMENT

(Continued)

EXHIBIT A

COMMITTED LEASE(S)

AREA BLOCK OCS LEASE NUMBER