; or (ii) to attempt to mitigate the identified issues if the issues cannot be fully resolved. (B) Extension (i) In general A project sponsor may request from the Council an extension of not more than 120 days to complete a remediation proposal described in subparagraph (A). (ii) Approval required If the Council receives a request from a project sponsor for an extension under clause (i), the Council shall approve that request. (iii) Treatment of the agency of jurisdiction If an extension is requested and approved under clauses (i) and (ii), respectively, an agency of jurisdiction may, notwithstanding subparagraph (A), submit the remediation proposal required under that subparagraph (A) within the extension period described in clause (i). (C) Agency compliance If an agency of jurisdiction fails to submit a remediation proposal in the time period described in subparagraph (A) or (B)(i), as applicable, the Council shall— (i) approve the remediation proposal submitted by the project sponsor; and (ii) direct the agency of jurisdiction to reauthorize all applicable authorizations for the project. (D) Council review (i) In general Not later than 60 days after the date on which a project sponsor and an agency of jurisdiction submit a remediation proposal in accordance with subparagraph (A) or (B)(i), as applicable, the Council shall— (I) hold any necessary joint meetings between the project sponsor and the agency of jurisdiction to assist in reaching a final remediation plan described in clause (ii); (II) complete a final remediation plan