; and (iii) the Secretary concerned to respond to a request by an owner or operator under clause (ii); and (E) describe processes for— (i) identifying changes in conditions; and (ii) modifying the approved plan, if necessary. (4) Review and approval process (A) In general The Secretary concerned shall develop a process for the review and approval of plans submitted under paragraph (1) that— (i) includes timelines and benchmarks for— (I) the submission of agency comments on the plans and schedules for final decision; and (II) the timely review of modifications of the plans in cases in which modifications are necessary; (ii) is consistent with applicable law