; (ii) make a determination with respect to whether to authorize the use of the alternative staging regime; and (iii) provide to each producer a response in writing stating whether the producer may use the alternative staging regime. (B) Establishment of a public list The Trade Representative shall maintain, and update as necessary, a public list of the producers of covered vehicles that have been authorized to use the alternative staging regime. (C) Reporting Before a determination is made with respect to whether to authorize the use of the alternative staging regime, the Trade Representative shall provide to the appropriate congressional committees a summary of requests for the alternative staging regime. (4) Alternative staging regime review and modification (A) Material changes to circumstances (i) Notification If the request of a producer to use the alternative staging regime for more than 10 percent of the total production of passenger vehicles or light trucks, as the case may be, in USMCA countries by the producer has been granted, the producer shall notify the Trade Representative and the interagency committee of any material changes to the information contained in the request, including any supplemental information relating to that request, and of any material changes to circumstances, that will affect the producer’s ability to meet any of the requirements set forth in articles 2 through 7 of the automotive appendix after the alternative staging regime period has expired. (ii) Requests for modification of plans (I) In general A producer that submits a notification under clause (i) with respect to a change described in that clause may submit to the Trade Representative and the interagency committee a request for modification of its plan. (II) Determination regarding modification Not later than 90 days after receiving a request submitted under subclause (I), the Trade Representative, in consultation with the interagency committee, shall— (aa) review the request