available credits and updated foreign currency exchange rates: Provided further , That any such credits shall only be available for United States assessed contributions to the United Nations regular budget, and the Committees on Appropriations shall be notified when such credits are applied to any assessed contribution, including any payment of arrearages: Provided further , That any notification regarding funds appropriated or otherwise made available under this heading in this Act or prior Acts making appropriations for the Department of State, foreign operations, and related programs submitted pursuant to section 7015 of this Act, section 34 of the State Department Basic Authorities Act of 1956 ( 22 U.S.C. 2706 ), or any operating plan submitted pursuant to section 7070 of this Act, shall include an estimate of all known credits currently attributable to the United States and provide updated assessment costs including offsets from available credits and updated foreign currency exchange rates: Provided further , That any payment of arrearages under this heading shall be directed to activities that are mutually agreed upon by the United States and the respective international organization and shall be subject to the regular notification procedures of the Committees on Appropriations: Provided further , That none of the funds appropriated under this heading shall be available for a United States contribution to an international organization for the United States share of interest costs made known to the United States Government by such organization for loans incurred on or after October 1, 1984, through external borrowings. Contributions for international peacekeeping activities For necessary expenses to pay assessed and other expenses of international peacekeeping activities directed to the maintenance or restoration of international peace and security, $1,589,496,000, of which 15 percent shall remain available until September 30, 2020: Provided , That none of the funds made available by this Act shall be