Cal. Wat. Code § 12887.6
A public agency may annually levy or cause to be levied upon all property in the public agency, or in any portion or portions thereof, subject to taxation or assessment by the public agency an ad valorem tax or assessment, based upon the assessed valuation of such property, necessary and sufficient to meet all commitments, financial or otherwise, of the public agency that are set forth in any contract which the agency enters into with the department under this chapter, in addition to any other taxes or assessments which the public agency is authorized to levy or cause to be levied on such property and notwithstanding any provision in the law applicable to such agency which might otherwise preclude or limit such taxing or assessing. Where the law applicable to such public agency does not set forth a procedure for levying and collecting taxes or assessments on an ad valorem basis, such public agency shall utilize the procedure for levying and collecting taxes for the payment of principal and interest on general obligation bonds of municipal water districts, set forth in the Municipal Water District Law of 1911 (Division 20 (commencing with Section 71000) of this code), as it may now or hereafter be amended, for the purpose of levying and collecting taxes or assessments necessary and sufficient to meet commitments in a contract entered into under this chapter.
Ca. Water Code § 12887.6