A party-at-interest, other than the party-at-interest which requested and received the initial final determination, may ask Customs to consider the matter anew and issue, on an expedited basis, a new final determination. Such a request shall specifically identify the previous final determination. Upon receipt of such a request, Customs will issue a new final determination within five working days of receipt of the request unless (a) the previous final determination was the subject of a contested lawsuit timely filed in the Court of International Trade under 28 U.S.C. § 1581(e) or, (b) the merchandise at issue in the initial final determination was tendered and deemed responsive to the request for proposals or an invitation for bids in a competitive procurement subject to the Buy American Act (41 U.S.C. § 10a et seq.) and a contract under such procurement was let. Any new final determination issued under this section shall be published in accordance with § 177.29 and is reviewable under § 177.30.