nationals, assassination plots against United States nationals outside and within the United States, and intelligence activities are a security or terrorist threat to the United States and United States interests and shall be a primary consideration in limiting travel of Iranian diplomats seeking admission to the United States for United Nations activities and their family members. (c) Denial of visas Section 407(a)(1) of the Foreign Relations Authorization Act, Fiscal Years 1990 and 1991 ( 8 U.S.C. 1102 note) is amended— (1) by striking (1) and inserting (1)(A)