; 130 Stat. 1749): Provided further , That for funds appropriated under this heading, the date specified in section 3216 of Public Law 114–322 shall be applied as substituting September 30, 2028 for September 30, 2021 . Indian land and water claim settlements and miscellaneous payments to Indians For payments and necessary administrative expenses for implementation of Indian land and water claim settlements pursuant to Public Laws 99–264, 100–580, 101–618, 111–11, 111–291, and 114–322, and for implementation of other land and water rights settlements, $50,057,000, to remain available until expended: Provided , That the Secretary shall make payments in such amounts as necessary to satisfy the total authorized amount for the Navajo Nation Water Rights Trust Fund. Indian guaranteed loan program account For the cost of guaranteed loans and insured loans, $10,779,000, of which $1,455,000 is for administrative expenses, as authorized by the Indian Financing Act of 1974: Provided , That such costs, including the cost of modifying such loans, shall be as defined in section 502 of the Congressional Budget Act of 1974: Provided further , That these funds are available to subsidize total loan principal, any part of which is to be guaranteed or insured, not to exceed $174,616,164. Administrative provisions The Bureau of Indian Affairs may carry out the operation of Indian programs by direct expenditure, contracts, cooperative agreements, compacts, and grants, either directly or in cooperation with States and other organizations. Notwithstanding Public Law 87–279 ( 25 U.S.C. 15 ), the Bureau of Indian Affairs may contract for services in support of the management, operation, and maintenance of the Power Division of the San Carlos Irrigation Project. Notwithstanding any other provision of law, no funds available to the Bureau of Indian Affairs for central office oversight and Executive Direction and Administrative Services (except executive direction and administrative services funding for Tribal Priority Allocations, regional