; (B) acts of international terrorism; or (C) the proliferation of weapons of mass destruction. (2) Compliance with united nations headquarters agreement Subsection (c) shall not apply to the head of state of Iran, or necessary staff of that head of state, if admission 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. (g) Waiver (1) In general The President may waive the application of subsection (c) or (d) with respect to an individual for a period of 180 days, and may renew that waiver for additional periods of 180 days, if the President— (A) determines that the waiver is vital to the national security of the United States; and (B) not less than 7 days before the waiver or the renewal of the waiver, as the case may be, takes effect, submits a report to the appropriate congressional committees on the waiver and the reason for the waiver. (2) Limitation on waiver authority The President may not exercise the waiver authority provided under paragraph (1) to implement any international agreement with Iran unless, before exercising the waiver authority, the agreement is approved through the enactment of a joint resolution or the Senate provides its advice and consent with respect to the agreement pursuant to section 2 of article II of the Constitution of the United States. (3) Form of report Each report submitted under paragraph (1)(B) shall be submitted in unclassified form, but may include a classified annex if necessary. (h) Definitions In this section: (1) Own or control The term own or control means, with respect to an entity— (A) to hold more than 25 percent of the equity interest by vote or value in the entity; (B) to hold any seats on the board of directors of the entity