; $234,725,000, to remain available until expended: Provided, That in order to ensure timely completion of construction projects, the Secretary of the Interior may assume control of a project and all funds related to the project, if, not later than 18 months after the date of the enactment of this Act, any Public Law 100–297 ( 25 U.S.C. 2501 , et seq.) grantee receiving funds appropriated in this Act or in any prior Act, has not completed the planning and design phase of the project and commenced construction. ADMINISTRATIVE PROVISIONS The Bureau of Indian Affairs and the Bureau of Indian Education 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 or the Bureau of Indian Education for central office oversight and Executive Direction and Administrative Services (except Executive Direction and Administrative Services funding for Tribal Priority Allocations, regional offices, and facilities operations and maintenance) shall be available for contracts, grants, compacts, or cooperative agreements with the Bureau of Indian Affairs or the Bureau of Indian Education under the provisions of the Indian Self-Determination Act or the Tribal Self-Governance Act of 1994 ( Public Law 103–413 ). In the event any tribe returns appropriations made available by this Act to the Bureau of Indian Affairs or the Bureau of Indian Education, this action shall not diminish the Federal Government’s trust responsibility to that tribe, or the government-to-government relationship between the United States and that tribe, or that tribe’s ability to access future appropriations.