; and (B) either— (i) the Tribe moves forward with the Phase I Reservoir described in section 3.4.B.(1) of the 2007 Agreement; or (ii) if the Tribe selects a substitute site pursuant to section 3.4.B.(2) of the 2007 Agreement, either— (I) the Parties agree on Operation Rules; or (II) the Secretary determines, in the discretion of the Secretary, that the Parties have reached an impasse in attempting to negotiate the Operation Rules. (3) Modifications Nothing in this Act prohibits the Secretary, after execution of the 2007 Agreement, from approving any modification to the 2007 Agreement, including any exhibit to the 2007 Agreement, that is consistent with this Act, to the extent that the modification does not otherwise require congressional approval under section 2116 of the Revised Statutes ( 25 U.S.C. 177 ) or any other applicable provision of Federal law. (c) Environmental compliance (1) In general In implementing the 2007 Agreement and this Act, the Secretary shall comply with all applicable provisions of— (A) the Endangered Species Act of 1973 ( 16 U.S.C. 1531 et seq. ); (B) the National Environmental Policy Act of 1969 ( 42 U.S.C. 4321 et seq. ), including the implementing regulations of that Act; and (C) other applicable Federal environmental laws and regulations. (2) Compliance (A) In general In implementing the 2007 Agreement and this Act, the Tribe shall prepare any necessary environmental documents, consistent with all applicable provisions of— (i) the Endangered Species Act of 1973 ( 16 U.S.C. 1531 et seq. ); (ii) the National Environmental Policy Act of 1969 ( 42 U.S.C. 4231 et seq. ), including the implementing regulations of that Act; and (iii) all other applicable Federal environmental laws and regulations. (B) Authorizations The Secretary shall— (i) independently evaluate the documentation submitted under subparagraph (A)