EXHIBIT 10.66 AMENDMENT TO THE TRITON EXPLORATION SERVICES, INC. 401(K) SAVINGS PLAN Triton Exploration Services, Inc., a Delaware corporation (the "Company"), acting by and through its undersigned authorized officer, adopts this amendment to the Triton Exploration Services, Inc. 401(k) Savings Plan (the "Plan"), effective as set forth hereafter. WHEREAS, the Company is the sponsor of the Plan; and WHEREAS, the Company desires to amend the Plan; and WHEREAS, Section 10.01 authorizes the Company to amend the Plan; NOW, THEREFORE, the Plan is amended as follows: 1. The following is added as a new paragraph under the vesting schedule in Section 1.40 of the Plan to read as follows: "Notwithstanding the foregoing, the Accrued Benefit of any Participant whose covered employment under the Plan was terminated by the Employer in connection with the implementation of the Employer's 1998 restructuring plan shall be fully vested and immediately nonforfeitable as of the date of termination of each such person's covered employment." 2. Except as otherwise provided herein, the Plan remains unamended and in full force and effect. EXECUTED effective this the 1st day of August, 1998. TRITON EXPLORATION SERVICES, INC. By: /s/ Robert B. Holland Title: Interim CEO