Prohibits the obligation of U.S. funds to the UN or any of its agencies (including the UN Development Program), or to OECD or any of its agencies, unless the President certifies to Congress 15 days in advance of such payment that the UN or OECD and their agencies are not engaged in any efforts to develop or promote any taxation or fee proposals in order to raise revenue or any proposals allowing foreign taxation on U.S.-source income.