; and (B) by striking is awarded. and inserting is awarded, but such jurisdiction is subject to time limits as follows: (A) A protest based upon alleged improprieties in a solicitation that are apparent before bid opening or the time set for receipt of initial proposals shall be filed before bid opening or the time set for receipt of initial proposals. In the case of a procurement where proposals are requested, alleged improprieties that do not exist in the initial solicitation but that are subsequently incorporated into the solicitation shall be protested not later than the next closing time for receipt of proposals following the incorporation. A protest that meets these time limitations that was previously filed with the Comptroller General may not be reviewed. (B) A protest other than one covered by subparagraph (A) shall be filed not later than 10 days after the basis of the protest is known or should have been known (whichever is earlier), with the exception of a protest challenging a procurement conducted on the basis of competitive proposals under which a debriefing is requested and, when requested, is required. In such a case, with respect to any protest the basis of which is known or should have been known either before or as a result of the debriefing, the initial protest shall not be filed before the debriefing date offered to the protester, but shall be filed not later than 10 days after the date on which the debriefing is held. (C) If a timely agency-level protest was previously filed, any subsequent protest to the United States Court of Federal Claims that is filed within 10 days of actual or constructive knowledge of initial adverse agency action shall be considered, if the agency-level protest was filed in accordance with subparagraphs (A) and (B), unless the contracting agency imposes a more stringent time for filing the protest, in which case the agency’s time for filing shall control. In a case where an alleged impropriety in a solicitation is timely protested to a contracting agency, any