agreements. (2) Waiver The President may waive, on a case-by-case basis, the imposition of sanctions for a period of not more than one year, and may renew that waiver for additional periods of not more than one year, any sanction or penalty under this section if the President submits to the appropriate congressional committees a written determination that the waiver meets one or more of the following requirements: (A) The waiver is important to the economic or national security interests of the United States. (B) The waiver will further the enforcement of this Act or is for an important law enforcement purpose. (C) The waiver is for an important humanitarian purpose. (3) Removals of sanctions and designations The President may prescribe rules and regulations for the removal of sanctions under subsections (b), (c), and (d) and the removal of designations under subsection (a) if the President determines that a foreign person, agency or instrumentality of a foreign state, or government of a foreign state subject to such sanctions, as the case may be, has verifiably ceased its participation in any of the conduct with respect to which the foreign person, agency or instrumentality of a foreign state, or government of a foreign state, as the case may be, was subject to sanctions under this section and has given assurances that it will no longer participate in such conduct. (4) Exception to comply with united nations headquarters agreement Sanctions under subsection (c) shall not apply to a foreign person if admitting the foreign person 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. (f) Briefing to Congress (1) In general Not later than 180 days after the date of the enactment of this section, and periodically thereafter, the President shall provide to