; and (3) unexpended balances in the offsetting collections fund pursuant to the fourth and fifth provisos in the matter under the heading Operation and Maintenance, Southwestern Power Administration under the heading Power Marketing Administrations under the heading Department of Energy in title III of the Energy and Water Development and Related Agencies Appropriations Act, 2010 ( 16 U.S.C. 825s–7 ) (as in effect on the day before the date of enactment of this Act). (c) Availability Amounts in the Fund shall remain available until expended. (d) Use Amounts in the Fund shall be used by the Secretary, acting through the Administrator, for expenses necessary for— (1) operation and maintenance of power transmission facilities; (2) marketing electric power and energy; (3) construction and acquisition of transmission lines, substations, and appurtenant facilities; and (4) administrative expenses in carrying out the duties of the Secretary under— (A) section 5 of the Act of December 22, 1944 (commonly known as the Flood Control Act of 1944 ) ( 16 U.S.C. 825s )