22 U.S.C. § 8162

(a) Certain individuals prohibited from obtaining access No national of a country designated by the Secretary of State under section 2371 of this title as a government supporting acts of international terrorism shall be permitted access to the United States to carry out an inspection activity under the Additional Protocol or a related safeguards agreement. (b) Presence of United States Government personnel IAEA inspectors shall be accompanied at all times by United States Government personnel when inspecting sites, locations, facilities, or activities in the United States under the Additional Protocol. (c) Vulnerability and related assessments The President shall conduct vulnerability, counterintelligence, and related assessments not less than every 5 years to ensure that information of direct national security significance remains protected at all sites, locations, facilities, and activities in the United States that are subject to IAEA inspection under the Additional Protocol.