; and (bb) a statement that if the project beneficiary believes that the consent of the project beneficiary is required, the project beneficiary shall send to the Secretary a reply not later than 30 days after the date of receipt of the notice that includes an explanation of the reasons that the project beneficiary would experience adverse impacts as a result of the project modification. (C) Final determination (i) Written response The Secretary shall respond in writing to any reply from a project beneficiary under subparagraph (B)(ii)(II)(bb) stating whether or not the Secretary determines that the project beneficiary would experience adverse impacts as a result of the project modification. (ii) Final agency action A written determination by the Secretary under clause (i) shall be considered to be a final agency action for purposes of section 704 of title 5, United States Code. (iii) Written request If the Secretary determines under clause (i) that the project beneficiary would experience adverse impacts as a result of the project modification, the Secretary shall send to the project beneficiary a written request for consent in accordance with subparagraph (B)(ii). (D) Time period for consent (i) In general If written consent required under paragraph (1)(D) is not obtained by the date that is 1 year after the date on which written consent is requested under subparagraph (B)(ii), the transferred works operating entity shall proceed with extraordinary operation and maintenance work of the project without the modification, unless the Secretary extends the time for consent under clause (ii). (ii) Extension At the discretion of the Secretary, the Secretary may elect to extend the time for obtaining consent under paragraph (1)(D) by 1 year. (3) Reallocation of costs based on project changes and increased public benefits The Secretary shall allocate costs, including capital repayment costs and operation and maintenance costs, for a project modification under paragraph (1), to provide that— (A) annual operation and