; and (II) 65 percent of the total repayment obligation shall be repaid to the United States over a period of 50 years. (ii) Inclusion Although the Secretary shall not condition the agreement to the contract entered into under subparagraph (A) on any other term, the contract may include other terms that are not less favorable to the contractor than contract numbered 16–WC–20–4838. (5) Cost Allocation Past and future costs incurred by the Secretary for compliance with laws enacted by the United States for protection of the environment that are not explicitly identified in contracts between the Secretary and a Klamath Project contractor shall not be— (A) allocated to such contractor; or (B) considered in determining the contractor’s responsibility for reimbursement of the costs of operation, maintenance, rehabilitation, modification, or replacement of Klamath Project works. . (b) Administration; effect (1) Compliance In implementing the amendments made by this section, the Secretary of the Interior shall comply with— (A) the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq. ); (B) the Endangered Species Act of 1973 ( 16 U.S.C. 1531 et seq. ); and (C) all other applicable laws. (2) Effect None of the amendments made by this section— (A) modify any authority or obligation of the United States with respect to any Tribal trust or treaty obligation of the United States; (B) create or determine any water right; (C) affect any water right or water right claim in existence on the date of the enactment of this Act; or (D) authorize the use of Federal funds for the physical deconstruction of the Iron Gate, Copco 1, Copco 2, or John C. Boyle Dam located on the Klamath River in the States of California and Oregon.