Disapproving the certification of the President under section 490(b) of the Foreign Assistance Act of 1961 regarding foreign assistance for Mexico during fiscal year 1999.

Disapproves the President's determination contained in the foreign assistance certification submitted to the Congress on February 26, 1999, that Mexico has cooperated fully with the United States to achieve full compliance with the goals and objectives established by the United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances.

Makes the requirement to withhold U.S. assistance and to vote against multilateral development bank assistance contained in the Foreign Assistance Act of 1961 inapplicable with respect to Mexico until March 1, 2000, if at any time after the date of this Act's enactment the President submits to Congress a determination and certification consistent with that Act that the vital national interests of the United States require that the assistance be provided for Mexico and that the United States not vote against multilateral development bank assistance for Mexico.