; or (2) if no definition for the term is provided in the 2007 Agreement, shall be used in a manner consistent with its use in the 2007 Agreement. 4. Ratification of 2007 Agreement (a) Ratification (1) In general Except as modified by this Act and to the extent that the 2007 Agreement does not conflict with this Act, the 2007 Agreement is authorized, ratified, and confirmed. (2) Amendments (A) General amendments If an amendment to the 2007 Agreement, or to any exhibit attached to the 2007 Agreement requiring the signature of the Secretary, is executed in accordance with this Act to make the 2007 Agreement consistent with this Act, the amendment is authorized, ratified, and confirmed. (B) Specific amendments (i) Substitute sites If a substitute site for the Phase I Reservoir is identified by the Tribe pursuant to section 3.4.B.(2)(a) of the 2007 Agreement, then amendments related to the Operation Rules are authorized, ratified, and confirmed, to the extent that such Amendments are consistent with the 2007 Agreement and this Act. (ii) Priority date Amendments agreed to by the Parties to establish that the priority date for the Tribal Water Right is no later than January 9, 1873, is authorized, ratified, and confirmed. (iii) Senior water rights Amendments agreed to by the Parties to accommodate senior water rights of those Downstream Water Users described in section 3(a)(4)(C) are authorized, ratified, and confirmed, to the extent that the Court finds any such Downstream Water Users possess senior water rights that can be accommodated only by amendment of the 2007 Agreement. (iv) Other amendments Other amendments agreed to by the Parties to facilitate implementation and approval of the 2007 Agreement are authorized, ratified, and confirmed, to the extent that such amendments are otherwise consistent with this Act and with other applicable law. (b) Execution (1) In general To the extent the 2007 Agreement does not conflict with this Act, the Secretary shall execute the 2007 Agreement, in accordance with paragraph