The department shall certify to the auditor and board of supervisors of each county in which each maintenance area, or part thereof, lies, the amount required, in order to pay the estimate for the ensuing fiscal year or the current fiscal year where no assessment has been levied or collected for the current fiscal year, to be levied in each area, and if the area is divided into zones, the amount required to be levied for such purposes in each zone.
Ca. Water Code § 12878.34