Exceptions; waiver

(a) Exceptions (1) Exception to comply with international obligations Sanctions described in section 317(2) shall not apply with respect to the admission of an alien if admitting or paroling the alien into 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, or other applicable international obligations. (2) Exception relating to the provision of humanitarian assistance Sanctions under this title may not be imposed with respect to transactions or the facilitation of transactions for— (A) the sale of agricultural commodities, food, medicine, or medical devices; or (B) the provision of humanitarian assistance; or (C) financial transactions relating to humanitarian assistance; (3) Exception for intelligence, law enforcement, and national security activities Sanctions under this title shall not apply to any authorized intelligence, law enforcement, or national security activities of the United States. (b) National security waiver The President may waive the imposition of sanctions under this title with respect to a person if the President— (1) determines that such a waiver is in the extraordinarily vital to the national security of the United States; and (2) submits to the appropriate committees of Congress a notification of the waiver and the reasons for the waiver no less than 15 days before the use of the waiver.