shall not apply to any authorized intelligence, law enforcement, or national security activities of the United States. (3) Compliance with united nations headquarters agreement Paragraphs (2) and (3) of subsection (b) shall not apply if admission of an alien to the United States is necessary to permit the United States to comply with the Agreement regarding the Headquarters of the United Nations, signed at Lake Success, June 26, 1947, and entered into force, November 21, 1947, between the United Nations and the United States. (4) Exception relating to importation of goods (A) In general The authority or a requirement to impose sanctions under this section shall not include the authority or a requirement to impose sanctions on the importation of goods. (B) Good defined In this paragraph, the term good means any article, natural or manmade substance, material, supply, or manufactured product, including inspection and test equipment, and excluding technical data. (d) Implementation