CHAPTERI, SECTION 3 SECTION 3 CONTRACT HISTORY Contract AT(29-2)-20 was modified 14 times during Operation HARDTACK. Other changes were made in the basic contract and Appendix B by the use of 25 approved Re-imbursement Authorizations. The contract as constituted for Operation HARDTACK, Phase I, was divided into three main jobs, as follows: Job I. - Engineering, Design, Inspection, Construction, and Procurement Job II - Operation and Management of the EPG Job III - Maintenance of the EPG The various modifications to the contract made during Operation HARDTACK,Phase I, were as follows: Modification 55, dated 29 June 1956, ef- fective 1 July 1956, restated the entire contract with new Appendices A and B. Modification 56, dated 7 September 1956, effective immediately, increased the “Obligated Funds” available for use under the contract. Modification 57 was not applicable to this Operation. Modification 58, dated 27 December 1956, effective immediately, deleted Part V of Appen- dix A, revised paragraph 2, Article IV, of the basic contract, and increased the “Obligated Funds.” Modification 59, dated 31 December 1956, effective 1 July 1956, revised Appendix A, firmed and enlarged the scope of work of Job I, and stated the estimated cost for the procurement of equipment for FY 1957 and the estimated cost of Jobs II and III for the six months ending 30 June 1957. Modification 60, dated 24 June 1957, effective immediately, amended paragraph 2 of Article IV of the basic contract to mcrease the “Obligated Funds” available. Modification 61, dated 1 August 1957, ef- fective 1 July 1956, revised Appendix A by defining and increasing the scope of work under Job I and by stating the estimated costs for Jobs II and III for the 6-month period ending 31 December 1957 and the estimated costs for procurement of equipment for FY 1958. Modification 62, dated 15 August 1957, effective immediately, amended paragraph 2 of Article IV increasing the “Obligated Funds” available. Modification 63, dated 2 August 1957, effective immediately, amended and revised paragraph 5 of Article XXV to incorporate provisions and requirements for work performed under the contract within the scope of the Davis-Bacon Act. Modification 64, dated 19 September 1957, effective immediately, amended paragraph 2 of Article IV to increase the “Obligated Funds” available. Modification 65, dated 22 October 1957, effective immediately, increased the amount of work under Job I of Appendix A. Modification 66, dated 26 December 1957, effective 1 July 1958, amended the contract to permit the Contractor to use Government-owned property in the performance of work in common service departments where the cost is allowable as an indirect item. Modification 67, dated 17 February 1958, effective 1 July 1956, revised Appendix A increasing the scope of work under Job I, stating the amount of Government-furnished material to be supplied and used by the Contractor in the performance of Job I and the estimated costs of Jobs II and III for the 6-month period ending 30 June 1958. Modification 68, dated 10 February 1958, effective immediately, amended paragraph 2 of Article IV to increase the “Obligated Funds” available. Modification 69, dated 22 April 1958, effective immediately, amended paragraph 2 of Article IV to increase the “Obligated Funds” available. Modification 70, dated 20 June 1958, effective immediately, amended paragraph 2 of Article IV to increase the “Obligated Funds” available. , Modification 71, dated 9 August 1958, effective 1 July 1956, increased and defined the scope of work under Job, I, stated the amount of Government-furnished material to be supplied Page 37