If payments required under contracts made by a contracting district for construction, improvement, operation, or maintenance of facilities, or for supplying of materials or services, in implementation of a salinity control contract are to be paid for or reimbursed by the United States, to the extent that such payments exceed the expenses that would have been incurred by a contracting district in the thorough and timely operation and maintenance of its salinity control lateral absent their improvement pursuant to a salinity control contract, then such contracts need not be submitted to a vote of the qualified voters of the contracting district.L. 88: Entire part added, p. 1229, § 1, effective April 6.