Proclamation 8693: Suspension of Entry of Aliens Subject to United Nations Security Council Travel Bans and International Emergency Economic Powers Act Sanctions, July 24, 2011 [open pdf - 612KB]
"In light of the firm commitment of the United States to the preservation of international peace and security and our obligations under the United Nations Charter to carry out the decisions of the United Nations Security Council imposed under Chapter VII, I have determined that it is in the interests of the United States to suspend the entry into the United States, as immigrants or nonimmigrants, of aliens who are subject to United Nations Security Council travel bans as of the date of this proclamation. I have further determined that the interests of the United States are served by suspending the entry into the United States, as immigrants or nonimmigrants, of aliens whose property and interests in property have been blocked by an Executive Order issued in whole or in part pursuant to the President's authority under the International Emergency Economic Powers Act (50 U.S.C. 1701 et seq.)."
Federal Register: http://www.gpo.gov/fdsys/browse/collection.action?collectionCode=FR
Federal Register (July 27, 2011), v.76 no.144, p.44751