Cal. Wat. Code § 26603
Within 30 days of the receipt of such resolution, the board of supervisors shall adopt a resolution advising the district of the charges to be made for the services to be performed by the county. If the board of directors elects to accept the terms offered by the county, it shall adopt a resolution reciting its acceptance, dispensing with the office of district assessor or with both the offices of district assessor and district collector, and transferring their duties to the assessor or to the assessor and tax collector of the county or counties in which the lands within the district are located. Such resolution shall specify whether, under the agreed upon procedure, lands subject to sale for unpaid assessments shall be sold to the district or be declared tax-defaulted for the nonpayment of those assessments.
Ca. Water Code § 26603