Congressional Budget Act of 1974 ( 2 U.S.C. 661a ): Provided further, That an additional $500,000, to remain available until expended, shall be for administrative contract expenses, including management processes to carry out the loan guarantee program: Provided further, That for fiscal year 2021, the Secretary may subsidize total loan principal, any part of which is to be guaranteed, up to $1,000,000,000: Provided further, That any unobligated balances, including recaptures and carryover, remaining from amounts made available under this heading in prior Acts may be used for costs of such guaranteed loans, subject to the total loan principal guarantee limitation under the preceding proviso. Native hawaiian housing block grant For the Native Hawaiian Housing Block Grant program, as authorized under title VIII of the Native American Housing Assistance and Self-Determination Act of 1996 ( 25 U.S.C. 4221 et seq.), $4,000,000, to remain available until September 30, 2025: Provided , That notwithstanding section 812(b) of such Act, the Department of Hawaiian Home Lands may not invest grant amounts made available under this heading in investment securities and other obligations: Provided further , That amounts made available under this heading in this and prior fiscal years may be used to provide rental assistance to eligible Native Hawaiian families both on and off the Hawaiian Home Lands, notwithstanding any other provision of law. Community planning and development Housing opportunities for persons with aids For carrying out the Housing Opportunities for Persons with AIDS program, as authorized by the AIDS Housing Opportunity Act ( 42 U.S.C. 12901 et seq.), $430,000,000, to remain available until September 30, 2022, except that amounts allocated pursuant to section 854(c)(5) of such Act shall remain available until September 30, 2023: Provided , That the Secretary shall renew all expiring contracts for permanent supportive housing that initially were funded under section 854(c)(5) of such Act from funds made