Cal. Wat. Code § 74630
If a district undertakes to execute a contract pursuant to this chapter, no part of the annual payments for the obligations assumed therein, as principal or guarantor, or the interest thereon, or the costs of maintenance and operation of the works so acquired or constructed, over and above the amounts available therefor from revenues, that is in excess of the limitations on assessment taxes provided in Sections 75357 and 75358, shall be levied until such contract has been approved by the voters of the district, or of the improvement district, for which such contract was made, by a majority of the voters thereof voting on the proposition, in the manner provided for the incurring of a bonded indebtedness. In the event of the approval of such contract by the voters, the limitations provided in Sections 75357 and 75358 shall not apply.
Ca. Water Code § 74630