Page:United States Statutes at Large Volume 70.djvu/534

 478

PUBLIC LAW 641-JULY 2, 1956

[70 S T A T.

of Reclamation provided for under the head "General Investigations" (but this authorization shall not preclude use of the appropriation under said head within that area), and for the continuation of investigations by agencies of the Department on a general plan for the development of the Missouri River Basin. Such allotments may be expended through or in cooperation with State and other Federal agencies, and advances to such agencies are hereby authorized. Sums appropriated herein which are expended in the performance of reimbursable functions of the Bureau of Reclamation shall be returnable to the extent and in the manner provided by law. No part of any appropriation for the Bureau of Reclamation, contained in this Act or in any prior Act, which represents amounts earned under the terms of a contract but remaining unpaid, shall be obligated for any other purpose, regardless of when such amounts are to be paid: Provided, That the incurring of any obligation prohibited by this paragraph shall be deemed a violation of section 3679 64 Stat. 765. ^f ^^iQ Reviscd Statutes, as amended (31 U.S.C. 665). No funds appropriated to the Bureau of Reclamation for operation and maintenance, except those derived from advances by water users, shall be used for the particular benefit of lands (a) within the boundaries of an irrigation district, (b) of any member of a water users' organization, or (c) of any individual, when such district, organization, or individual is in arrears for more than twelve months in the payment of charges due under a contract entered into with the United States pursuant to laws administered by the Bureau of Reclamation. Not to exceed $225,000 may be expended from the appropriation "Construction and Rehabilitation" for work by force account on any one project or Missouri Basin unit and then only when such work is unsuitable for contract or no acceptable bid has been received and, other than otherwise provided in this paragraph or as may be necessary to meet local emergencies, not to exceed 12 per centum of the construction allotment for any project from the appropriation "Construction and Rehabilitation" contained in this Act shall be available for construction work by force account, ojecu*' ^^"^"^ Sums which have heretofore been expended for construction purproject. poses on the Boulder Canyon project from operation and maintenance appropriations and revenue receipts shall be considered as having been advanced to the Colorado River dam fund and repaid to the Secretary of the Treasury as of May 31 of the same operating year. Funds made available herein and hereafter to the Trinity division. Central Valley project, shall be available for the design and construction of power and hydraulic facilities totaling not to exceed approximately four hundred thousand kilowatts. All funds expended for construction, operation, and maintenance of the two thousand-second-foot Wahluke siphon, Columbia Basin project, shall be reimbursable, but repayment of those parts thereof and of other expenditures for said project which the Secretary finds properly allocable to irrigable lands located on the Wahluke slope shall be deferred until they are no longer needed in connection with operations of the Atomic Energy Commission and have been irrigated. GENERAL PROVISIONS Attendance at meetings.

SEC. 201. Appropriations in this title available for travel expenses shall be available for expenses of attendance of officers and employees at meetings or conventions of members of societies or associations concerned with the work of the bureau or office for which the appropriation concerned is made.

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