; preparation of plans, specifications, and drawings; acquisition of sites, purchase and erection of modular buildings, and purchases of trailers; and for provision of domestic and community sanitation facilities for Indians, as authorized by section 7 of the Act of August 5, 1954 ( 42 U.S.C. 2004a ), the Indian Self-Determination Act, and the Indian Health Care Improvement Act, and for expenses necessary to carry out such Acts and titles II and III of the Public Health Service Act with respect to environmental health and facilities support activities of the Indian Health Service, $6,836,000, to remain available until expended, which shall be in addition to funds previously appropriated under this heading that became available on October 1, 2023; in addition, $457,063,000, to remain available until expended, for Sanitation Facilities Construction and Health Care Facilities Construction