; and (2) the Congress enacts a specific statutory authorization for the use of such forces. (b) (1) In the absence of a declaration of war, in any case in which United States forces are introduced into hostilities or into situations where there is a serious risk of hostilities— (A) when necessary to repel a sudden attack, or respond to a concrete, specific, and immediate threat of such a sudden attack, upon the territory, airspace, or waters of the United States, United States forces, or United States citizens; and (B) the time required to obtain prior specific statutory authorization for the use of such forces as required under subsection (a) would prevent an effective defense against the attack or threat of attack, the President shall, not later than 48 hours after ordering the use of such forces, inform the appropriate congressional committees and leadership of the President’s decision and describe the use of such forces, the justification for the use of such forces without prior specific statutory authorization, and certify whether hostilities have concluded or are continuing. (2) (A) Except as provided in subparagraph (B), not later than seven calendar days after ordering the use of United States forces as described in paragraph (1), the President shall submit to the appropriate congressional committees and leadership— (i) a request for specific statutory authorization for the use of such forces; and (ii) a report that meets the requirements of subsection (d)(1)(B). (B) The requirement to submit a request for specific statutory authorization for the use of United States forces under subparagraph (A) shall not apply in any case in which the President— (i) has withdrawn, removed, or otherwise ceased the use of such forces