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irrigated acreage because of variations in conditions in different areas overlying critical ground-water aquifers. Accordingly, no contracts for the delivery of supplemental water would be made with irrigation districts or other public entities unless: (1) Agreements are included not to deliver water to lands other than those having a recent irrigation history, as determined by the Secretary of the Interior, and (2) Arrangements, satisfactory to the Secretary of the Interior, are included to control ground-water with-drawals from critical ground-water aquifers underlying project service areas. 4. Enlargement of the California Aqueduct It is proposed that the State of California would design, construct, and operate whatever enlargement of the California Aqueduct is authorized and constructed for the Pacific Southwest Water Plan. The United States, however, would provide appropriate financial assistance and, consequently, would need to be assured through negotiated contractual arrangements that the foregoing functions would be performed properly. The State of California would be the marketing agent for the United States for water conveyed through the enlarged California Aqueduct to be marketed in California. The United States would have to be assured, however, that the additional imported water effectively maintained the basic supply of 7.5 million acre-feet per annum of consumptive use for the States of Arizona, Nevada, and California, 45Epson Perfection 4870 Photo, 400 dpi, 8 bit, 14,309,376 byte