33 U.S. Code § 561 - Advances by private parties; repayment
Whenever local interests shall offer to advance funds for the prosecution of a work of river and harbor improvement duly adopted and authorized by law the Secretary of the Army may, in his discretion, receive such funds and expend the same in the immediate prosecution of such work. The Secretary of the Army is authorized and directed to repay without interest, from appropriations which may be provided by Congress for river and harbor improvements, the moneys so contributed and expended: Provided, That no repayment of funds which may be contributed for the purpose of meeting any conditions of local cooperation imposed by Congress, nor under the authority of section 560 of this title shall be made.
Department of War designated Department of the Army and title of Secretary of War changed to Secretary of the Army by section 205(a) of act July 26, 1947, ch. 343, title II, 61 Stat. 501. Section 205(a) of act July 26, 1947, was repealed by section 53 of act Aug. 10, 1956, ch. 1041, 70A Stat. 641. Section 1 of act Aug. 10, 1956, enacted “Title 10, Armed Forces” which in sections 3010 to 3013 continued Department of the Army under administrative supervision of Secretary of the Army.