; or (B) does not intend to exercise review, permitting, or other authorization responsibility relating to, or submit comments on, implementation of the Plan. (2) Changed circumstances At the request of a Federal agency based on a showing of changed circumstances, the Secretary may designate a Federal agency that has opted out under paragraph (1)(A) to be a participating agency. (3) Effect Designation as a participating agency under paragraph (1) shall not grant the participating agency authority or jurisdiction over— (A) the Plan