(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.