CHAPTER |, SECTION 3 each month thereafter up to and including June 1954. It is understood and agreed by both parties that Jab IV - Support and Job V - Roll-up cover a service period of eighteen months and fourteen months, respectively, but since the bulk of the work will be performed from July 1, 1953 to June 30, 1954, and in the interest of simplicity in accounting, payments will be deferred until July 1953 and will be made in twelve equal payments. Part IV of the Contract detailed completion dates as follows: Job No. I Description a. Engineering, Design, Inspection and Construction b. Procurement of Construction and Operational Equipment c. Special Engineering Reports II Camp Operation in support of other than Holmes & Narver Completion Date March 31, 1954* Dec. 31, 1953 Oct. 15, 1952 June 30, 1954 personnel III Maintenance June 30, 1954 IV Support June 30, 1954 v Roll-up June 30, 1954 * As stated under Part III, Item 1A above, this date of March 31, 1954, is not necessarily the completion date for construction authorized before that date. However, any construction authorized after March 31, 1954, will be considered new scope of work and will be negotiated on that basis.” A discussion of the various modifications to Contract AT-(29-2)-20 as they affected OPERATION CASTLE will be limited to only those that do not pertain to additional scope of work since these have been previousl} tabulated. Modification 17, dated 30 March 1953, effective 1 January 1953, provided that the allowance for employee benefits be increased from 11.646% to 13.05%. This change was the result of the annual review provided for in Para- graph 4, Section C, Part I of Appendix B, forming a part of Contract AT-(29-2)-20. Modification 18, dated 2 June 1953, effective 18 October 1951, provided for the inclusion of stand-by time of engineers, draftsmen and designers, said stand-by time being the result of unforeseeable fluctuation in the Contractor’s work requirements under the Contract, as a direct charge to allowable overhead under the Contract. Modification 19, dated 17 June 1953,effective as indicated therein, provided for a revision of the wage and salary schedules contained in Appendix B and further provided for a leave of absence not to exceed two weeks for certain supervisory and administrative off-continent personnel. Modification 20, dated 26 June 1953, increased obligated funds by $500,000 - from $28, 482,000 to $28,982,000. Modification 21, dated 17 July 1953, increased obligated funds by $2,500,000 - from $28,982,000 to $31,482,000. Modification 22, dated 6 August 1953, effective as indicated therein, provided for the revision of wage rates for certain off-continent job classifications. Modification 24, dated 1 September 1953, increased obligated funds by $2,500,00 - from $33,982,000 to $36,482,000. Modification 25, dated 14 September 1953, increased obligated funds by $2,000,000 - from $36,482,000 to $38,482,000. Modification 27, dated 7 October 1953, amended the first subparagraph of Paragraph (a) Section 3, Article III to provide for an annual audit rather than a semi-annual audit to determine the percentage to be paid for allowable overhead. Modification 28, dated 2 November 1953, amended Article VI to provide for an annual audit of advanced fund disbursments rather than a quarterly audit. Modification 29, dated 22 October 1953, effective 1 October 1953, provided for a re- vision to Paragraph 4, Section C, Appendix B, requiring prior review and written approval of - the Commission for subsequent revisions of company policies which result in an jn¢rease in related costs under the Contract. Modification 30, dated 15 January 1954, effective 15 November 1953, provided for the re- vision of certain wage rates for on-continent employees and the inclusion of additional classifications. Modification 32, dated 12 April 1954,effective 1 January 1954, establishes a period of three years—after final payment under the Contract —in which the Comptroller General of the United States, or his representative, may have access and examine any books, documents, papers, and records involving transactions relating to the contract, Page 1-13