Cal. Rev. & Tax. Code § 2616

Not less than once every 12 months and on dates approved by the auditor, the tax collector shall account to the auditor for all moneys collected during the preceding reporting period. On the same day he or she shall file with the auditor a statement under oath, showing that all money collected by him or her has been paid as required by law.

Not less than once every 12 months and on dates approved by the auditor, the tax collector shall file with the auditor a statement under oath, showing an itemized account of all his or her transactions and receipts since his or her last settlement.

In counties using a mechanized management reporting system in reporting information for a uniform four-week period, the board of supervisors, by ordinance, may provide for the duties required by this section to be performed on a corresponding uniform four-week period.