to reduce emissions. 9. Native American Housing Block Grant Program (a) In general There is authorized to be appropriated for carrying out the Native American housing block grant program under title I of the Native American Housing Assistance and Self-Determination Act of 1996 ( 25 U.S.C. 4111 et seq.) $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, other strategies to reduce emissions. 10. HOME Investment Partnerships Program (a) In general There is authorized to be appropriated for carrying out the HOME Investment Partnership Program under title II of the Cranston-Gonzalez National Affordable Housing Act ( 42 U.S.C. 12721 et seq.) $5,000,000,000, 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, other strategies to reduce emissions. 11. Program for supportive housing for persons with disabilities (a) In general There is authorized to be appropriated $2,500,000,000 for project rental assistance under the program for supportive housing for persons with disabilities under section 811(b)(3) of the Cranston-Gonzalez National Affordable Housing Act ( 42 U.S.C. 8013(b)(3) ) for State housing finance agencies, 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. 12. Program for supportive housing for the elderly (a) In general There is authorized to be appropriated $2,500,000,000 for— (1) capital advances pursuant to section 202(c)(1) of