; or (D) Colorado River water. (66) Water right The term water right means any right or rights in or to groundwater, surface water, effluent, or Colorado River water under Federal, State, or other law. 4. Ratification and execution of Hualapai Tribe water rights settlement agreement (a) Ratification (1) In general Except as modified by this Act and to the extent that the Hualapai Tribe water rights settlement agreement does not conflict with this Act, the Hualapai Tribe water rights settlement agreement is authorized, ratified, and confirmed. (2) Amendments If an amendment to the Hualapai Tribe water rights settlement agreement, or to any exhibit attached to the Hualapai Tribe water rights settlement agreement requiring the signature of the Secretary, is executed in accordance with this Act to make the Hualapai Tribe water rights settlement agreement consistent with this Act, the amendment is authorized, ratified, and confirmed, to the extent the amendment is consistent with this Act. (b) Execution (1) In general To the extent the Hualapai Tribe water rights settlement agreement does not conflict with this Act, the Secretary shall execute the Hualapai Tribe water rights settlement agreement, including all exhibits to, or parts of, the Hualapai Tribe water rights settlement agreement requiring the signature of the Secretary. (2) Modifications Nothing in this Act prohibits the Secretary from approving any modification to an appendix or exhibit to the Hualapai Tribe water rights settlement 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 The Secretary shall carry out all Federal compliance activities necessary to implement the Hualapai Tribe water rights settlement agreement (including all exhibits to the Hualapai Tribe water rights settlement agreement requiring the signature of the