; or (ii) require that such a plan or any necessary amendment be prepared jointly by the Councils concerned, if the fishery requires conservation and management under this Act. (D) Not later than 2 years after the date on which the last of the Councils concerned makes a decision pursuant to subparagraph (B)(ii) or the date on which the Secretary makes a decision pursuant to subparagraph (C), and at such other times as required under this Act, the Council or Councils designated under subparagraph (B)(ii) or (C) (as applicable) shall prepare and submit a fishery management plan, or any necessary amendment to such a plan, if the fishery requires conservation and management under this Act. (E) (i) At the request of a Council in accordance with the procedures established under subparagraph (A), the Secretary shall determine whether a fishery described in subparagraph (B) no longer has a substantial portion that extends beyond the geographical area of authority of any one Council. (ii) If the Secretary determines under clause (i) that a fishery no longer has a substantial portion that extends beyond the geographical area of authority of any one Council— (I) the Secretary shall determine in which Council's geographical area of authority the fishery is predominant