To impose limitations on the placing of United States Armed Forces under the operational control of a foreign national acting on behalf of the United Nations.

Prohibits funds appropriated or otherwise available to the Department of Defense from being obligated or expended for activities of any element of the armed forces that is placed under the operational control of a foreign national acting on behalf of the United Nations (UN), unless the President certifies to the Congress that such operational control is necessary to protect vital U.S. national security interests. Requires a follow-up report from the President to the Congress within ten days after such a certification. Provides an exception to such prohibition in the case of: (1) fewer than 100 members of the armed forces in any one country; (2) activities of the armed forces in Somalia as part of the (UN) operation designed as the UN Peacekeeping Operation in Somalia II; or (3) activities of the armed forces I Macedonia as part of the UN force designated as the UN Protection Force.