To amend the San Luis Rey Indian Water Rights Settlement Act, and for other purposes.

[AI summary unavailable — showing source text] Amends the San Luis Rey Indian Water Rights Settlement Act to direct the Secretary of the Interior, as an alternative by which to provide a supplemental water supply for the benefit of certain Mission Indian Bands in San Diego County, California, and the City of Escondido, California, the Escondido Mutual Water Company, and the Vista Irrigation District (local entities) to construct that portion of the All-American Canal Lining that is necessary to conserve 16,000 acre-feet of water per year and arrange to deliver such water to the Bands and such local entities by exchange or through contract with the Metropolitan Water District of Southern California and other parties with conveyance facilities. Requires the right to such water to be held in perpetuity by the United States in trust for the San Luis Rey Indian Water Authority subject to such Act and the settlement agreement governing the use and disposition of supplemental water. Authorizes appropriations for such construction, but prohibits Federal funding for operating, maintenance, or replacement costs. Directs the Secretary to determine the impact of such works constructed on the cost of operation and maintenance and the existi…