; (3) senior preservation rental assistance contracts, including renewals, as authorized by section 811(e) of the American Housing and Economic Opportunity Act of 2000 ( 12 U.S.C. 1701q note); and (4) supportive services associated with housing assisted under paragraph (1), (2), or (3). (b) Availability of amounts Any amounts appropriated pursuant to this section shall remain available until September 30, 2023. (c) 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, other strategies to reduce emissions. 13. Capital Magnet Fund (a) In general There is authorized to be appropriated for the Capital Magnet Fund under section 1339 of the Federal Housing Enterprises Financial Safety and Soundness Act of 1992 ( 12 U.S.C. 4569 ) $2,500,000,000, 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, other strategies to reduce emissions. 14. Community development block grant funding for affordable housing and infrastructure (a) Authorization of appropriations (1) In general Subject to the provisions of this section, there is authorized to be appropriated for assistance under the community development block grant program under title I of the Housing and Community Development Act of 1974 ( 42 U.S.C. 5301 et seq.) $10,000,000,000, to remain available until expended. (2) Administrative and planning costs Not more than 15 percent of any amounts appropriated pursuant to paragraph (1) may be used for administrative and planning costs. (b) Eligible activities Amounts made available for assistance under this section may be used only for— (1) the development and preservation of qualified affordable housing, including the construction of such housing