Gov. Code, § 25209.1

(a) During any fiscal year, the board of supervisors of any county or city and county may upon the recommendation of the county auditor authorize the treasurer of the county or city and county to make a temporary transfer from the funds in his custody to any school district in the county or city and county. Such temporary transfer shall be made only in the event that the funds transferred are not immediately needed to pay claims against such funds of the county treasury, and the temporary transfer of funds made to eligible school districts shall not exceed an amount computed to be equal to 50 percent of the school district’s entitlement for payment of Public Law 81-874 funds for the immediately preceding fiscal year.

(b) School districts may repay such temporary transfer of funds without any interest to the county or city and county on or before June 1 of the fiscal year in which the funds were transferred. Upon receipt of Public Law 81-874 funds next following the aforesaid transfer, the school district shall immediately apply all of such funds to the repayment of the funds transferred pursuant to subdivision (a).

If such temporary transfer of funds is not repaid by June 1 of the fiscal year in which the temporary transfer occurred, the county auditor shall withhold from the next principal apportionment of taxes an amount equal to the temporary transfer of funds and charges, less any repayments made by the school district.