To deny admission to the United States to any representative to the United Nations who has engaged in espionage activities against the United States, poses a threat to United States national security interests, or has engaged in a terrorist activity against the United States.

Amends the Foreign Relations Authorization Act, Fiscal Years 1990 and 1991 to direct the President to deny U.S. admission to any representative of the United Nations (U.N.) who: (1) has engaged in espionage activities or a terrorist activity against the United States or its allies, and (2) may pose a threat to U.S. national security interests.