Cal. Ed. Code § 42603
The governing board of any school district may direct that moneys held in any fund or account may be temporarily transferred to another fund or account of the district for payment of obligations. The transfer shall be accounted for as temporary borrowing between funds or accounts and shall not be available for appropriation or be considered income to the borrowing fund or account. Amounts transferred shall be repaid either in the same fiscal year, or in the following fiscal year if the transfer takes place within the final 120 calendar days of a fiscal year. Borrowing shall occur only when the fund or account receiving the money will earn sufficient income, during the current fiscal year, to repay the amount transferred. No more than 75 percent of the maximum of moneys held in any fund or account during a current fiscal year may be transferred.
Ca. Educ. Code § 42603