California Code, Government Code - GOV § 50613

The proceeds of the annual special assessments shall be paid to the treasurer of the local agency, who shall place the proceeds in a special fund to the credit of the district and payment shall be made out of the special fund only for the purposes provided for in this chapter for the district.  To expedite any maintenance work, the legislative body may at any time transfer into the special fund, out of any money in the general fund, such sums as it may deem necessary, and the sums so transferred shall be deemed as a loan to the special fund, and shall be repaid out of the proceeds of the assessments provided for in this chapter.

If a district is organized in any year too late for the levy of a special assessment in that year or in the next ensuing year, the legislative body is hereby authorized to transfer funds out of the general fund of the local agency to the special fund of the district to be used for the payment of the expenses of the district until such time as special assessment receipts are available therefor.  The legislative body shall include in the levy of the special assessment for the district for the first fiscal year in which the assessment may be levied or in ensuing years, a sum sufficient to repay the local agency the amount so transferred to the district for the portion or portions of the preceding fiscal year or years for which no levy of assessment was made for that purpose.  The amount so transferred shall be repaid into the general fund of the local agency from the district fund out of the first available receipts from the assessment levied or as determined by the legislative body.