of the Department, and for such portion of any office or agency’s printing, records management, space renovation, furniture, or supply services as the Secretary determines shall be derived from centralized sources made available by the Department to all offices and agencies and funded through the Fund: Provided , That of the amounts made available in this title for salaries and expenses under the headings Executive Offices , Administrative Support Offices , Program Office Salaries and Expenses , and Government National Mortgage Association , the Secretary shall transfer to the Fund such amounts, to remain available until expended, as are necessary to fund services, specified in the matter preceding the first proviso, for which the appropriation would otherwise have been available, and may transfer not to exceed an additional $5,000,000, in aggregate, from all such appropriations, to be merged with the Fund and to remain available until expended for use for any office or agency: Provided further , That amounts in the Fund shall be the only amounts available to each office or agency of the Department for the services, or portion of services, specified in the matter preceding the first proviso: Provided further , That with respect to the Fund, the authorities and conditions under this heading shall supplement the authorities and conditions provided under section 7(f). Public and indian housing Tenant-based rental assistance For activities and assistance for the provision of tenant-based rental assistance authorized under the United States Housing Act of 1937, as amended ( 42 U.S.C. 1437 et seq.) ( the Act herein), not otherwise provided for, $17,365,120,000, to remain available until expended, shall be available on October 1, 2017 (in addition to the $4,000,000,000 previously appropriated under this heading that shall be available on October 1, 2017), and $4,000,000,000, to remain available until expended, shall be available on October 1, 2018: Provided , That the amounts made available under this heading are