Cal. Pub. Util. Code § 12897
The board may elect to avail itself of the assessments made by the assessors of the counties in which the district is situated, and of the assessments made by the State Board of Equalization for those counties, and may take such assessments as the basis for district taxation and have its taxes collected by the county officials if the board declares its election so to do by resolution or ordinance and files a certified copy of the resolution or ordinance on or before the first day of August with the auditors of the counties in which the district is situated. Thereafter, each year and until otherwise provided by the board, all assessments shall be made for the district by the State Board of Equalization and the county assessors, and all taxes shall be collected for the district by the tax collectors, of the counties in which the district is situated.
Ca. Pub. Util. Code § 12897