Forces under the command or operational control of a foreign national, unless the President's military advisors have submitted to the President a recommendation that such involvement is in the national interest of the United States and the President has submitted to Congress such a recommendation: Provided further, That any payment of arrearages with funds appropriated by this Act shall be subject to the regular notification procedures of the Committees on Appropriations. International commissions For necessary expenses, not otherwise provided for, to meet obligations of the United States arising under treaties, or specific Acts of Congress, as follows: INTERNATIONAL BOUNDARY AND WATER COMMISSION, UNITED STATES AND MEXICO For necessary expenses for the United States Section of the International Boundary and Water Commission, United States and Mexico, and to comply with laws applicable to the United States Section, including not to exceed $6,000 for representation expenses, as follows: SALARIES AND EXPENSES For salaries and expenses, not otherwise provided for, $64,800,000, of which $9,720,000 may remain available until September 30, 2025. CONSTRUCTION For detailed plan preparation and construction of authorized projects, $156,050,000, to remain available until expended, as authorized: Provided, That of the funds appropriated under this heading in this Act and prior Acts making appropriations for the Department of State, foreign operations, and related programs for the United States Section, up to $5,000,000 may be transferred to, and merged with, funds appropriated under the heading Salaries and Expenses to carry out the purposes of the United States Section, which shall be subject to prior consultation with, and the regular notification procedures of, the Committees on Appropriations: Provided further, That such transfer authority is in addition to any other transfer authority provided in this Act. AMERICAN SECTIONS, INTERNATIONAL COMMISSIONS For necessary expenses, not otherwise provided, for the International