; as follows: Salaries and expenses For salaries and expenses, not otherwise provided for, $48,134,000. Construction For detailed plan preparation and construction of authorized projects, $29,400,000, to remain available until expended, as authorized. American sections, international commissions For necessary expenses, not otherwise provided, for the International Joint Commission and the International Boundary Commission, United States and Canada, as authorized by treaties between the United States and Canada or Great Britain, and the Border Environment Cooperation Commission as authorized by the North American Free Trade Agreement Implementation Act ( Public Law 103–182 ), $13,258,000: Provided, That of the amount provided under this heading for the International Joint Commission, up to $500,000 may remain available until September 30, 2020, and $9,000 may be made available for representation expenses: Provided further , That of the amount provided under this heading for the International Boundary Commission, $1,000 may be made available for representation expenses. International fisheries commissions For necessary expenses for international fisheries commissions, not otherwise provided for, as authorized by law, $50,651,000: Provided , That the United States share of such expenses may be advanced to the respective commissions pursuant to section 3324 of title 31, United States Code. Related Agency Broadcasting board of governors International broadcasting operations For necessary expenses to enable the Broadcasting Board of Governors (BBG), as authorized, to carry out international communication activities, and to make and supervise grants for radio, Internet, and television broadcasting to the Middle East, $804,486,000: Provided , That in addition to amounts otherwise available for such purposes, up to $34,508,000 of the amount appropriated under this heading may remain available until expended for satellite transmissions and Internet freedom programs, of which not less than $13,800,000 shall be for Internet