, 1485, 1486) $1,000,000,000, to remain available until expended. (b) Water and energy efficiency Not less than 10 percent of all amounts made available pursuant to this section shall be used only for activities relating to water and energy efficiency and, at the discretion of the Secretary of Agriculture, other strategies to reduce emissions. 6. Flood Mitigation Assistance Grant Program (a) In general There is authorized to be appropriated for carrying out the Flood Mitigation Assistance Grant Program under section 1366 of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4104c ) $1,000,000,000, to remain available until expended. (b) Flood risk mitigation Except as provided in subsection (c), the Administrator shall require that any structure that is located in an area having special flood hazards shall be elevated with the lowest floor, including the basement, not less than 2 feet above the base flood level if the structure, with amounts appropriated pursuant to this section— (1) is newly constructed