; (B) shall conform to any other agreements, such as applicable settlement agreements and newly constructed appurtenant facilities agreements; and (C) shall not modify any other water service, repayment, exchange, or transfer contractual right between the applicable water users' association and the Bureau of Reclamation, or any right, obligation, or relationship of the water users' association and any affected landowner in accordance with applicable State law. (c) Accounting (1) Final cost allocation Any amount paid pursuant to subsection (b) shall be subject to adjustment after a final cost allocation by the Secretary. (2) Contractor responsibility (A) In general If a final cost allocation under paragraph (1) indicates that a cost properly assignable to a contractor covered by this section is greater than the amount paid by the contractor, the contractor shall be obligated to pay the remaining allocated costs in accordance with an additional repayment contract under subparagraph (B). (B) Additional repayment contracts Subject to any other provision mutually agreed to by all affected parties, the term of an additional repayment contract under subparagraph (A) shall be— (i) not less than 1 year