Government Code § 30104
CHAPTER 7. Settlement With the State
Between the 1st and 15th of each month in which the county treasurer is required to settle with the State Controller, the county auditor shall make and verify by his affidavit a report in duplicate to the State Controller, in such form as the Controller prescribes, showing specifically the amount due the State from each particular source of revenue at the close of business on the last day of the month preceding the settlement.