that such unit has engaged in sexual exploitation or abuse, including while serving in a United Nations peacekeeping operation, until the Secretary determines that the government of such country is taking effective steps to hold the responsible members of such unit accountable and to prevent future incidents: Provided , That the Secretary shall promptly notify the government of each country subject to any withholding of assistance pursuant to this paragraph, and shall notify the appropriate congressional committees of such withholding not later than 10 days after a determination to withhold such assistance is made: Provided further , That the Secretary shall, to the maximum extent practicable, assist such government in bringing the responsible members of such unit to justice. (h) Additional availability Subject to the regular notification procedures of the Committees on Appropriations, funds appropriated by this Act which are returned or not made available due to the third proviso under the heading Contributions for International Peacekeeping Activities in title I of this Act or section 307(a) of the Foreign Assistance Act of 1961 ( 22 U.S.C. 2227(a) ), shall remain available for obligation until September 30, 2022: Provided , That the requirement to withhold funds for programs in Burma under section 307(a) of the Foreign Assistance Act of 1961 shall not apply to funds appropriated by this Act. War crimes tribunals 7049. (a) If the President determines that doing so will contribute to a just resolution of charges regarding genocide or other violations of international humanitarian law, the President may direct a drawdown pursuant to section 552(c) of the Foreign Assistance Act of 1961 of up to $30,000,000 of commodities and services for the United Nations War Crimes Tribunal established with regard to the former Yugoslavia by the United Nations Security Council or such other tribunals or commissions as the Council may establish or authorize to deal with such violations, without regard to the ceiling limitation