California Code, Water Code - WAT § 72071.1

The board may levy an ad valorem property tax in each improvement district established pursuant to Article 3 (commencing with Section 72062) of this chapter, sufficient to pay the share of the maintenance and operation costs of any improvements constructed from the proceeds of bonds authorized pursuant to this chapter, for each such improvement district.  The authorization of the bonds by the voters shall constitute authorization of the ad valorem property tax herein provided and no election need be held as provided in Chapter 3 (commencing with Section 2201) of Part 4 of Division 1 of the Revenue and Taxation Code.