Document: A Bill To approve a regional approach to the development of the water resources of the Pacific Southwest and to authorize features of the Initial Pacific Southwest Water Plan, 1-29-64, page 7contract under which water is provided under the project that there be in effect measures, adequate in the judgment of the Secretary, to control expansion of irrigation from aquifers affecting the contract service area. The Secretary is authorized to require as a condition in any contract under which water is provided under the project that the contractor agree to accept mainstream water in exchange for or in replacement of existing supplies from sources other than the mainstream but no such exchange or replacement shall require a contractor t...