California Code, Water Code - WAT § 31702.1

The board may, by resolution, elect to fix its own rates of taxation, in which event it shall file certified copies thereof with the auditor, the assessor and the clerk of the board of supervisors of the county in which it is situated, on or before July 1.  It shall thereafter continue to fix its own rate of taxation until it has filed with such officers certified copies of a resolution electing to the contrary.