Cal. Health & Saf. Code § 2876
Notwithstanding the basis upon which property in the district is taxed, if a district is organized in any year too late for the levy of a tax in that year or in the next ensuing year, the board of supervisors is authorized to transfer funds of the county not immediately needed for county purposes to the district fund to be used for the payment of the expenses of the district until the district's special assessment tax receipts are available to it. The board of supervisors shall include, in the levy of taxes for the district for the first fiscal year in which a tax may be levied, a sum sufficient to repay to the county the amounts transferred to the district for the portion or portions of the preceding fiscal year or years for which no levy of taxes was made for that purpose. The amounts transferred shall be retransferred to the county treasury from the district fund out of the first available receipts from the tax levy.
Ca. Health and Saf. Code § 2876