Cal. Educ. Code § 16721

The Controller shall, during the next fiscal year following that in which he determines the annual repayment as herein provided, deduct the total amount of the annual repayment of each district in equal amounts from each of the February, March, April, and May installments of the apportionments made to the district from the State School Fund and, on order of the State Controller, the amount so deducted shall be transferred to the Urban School Construction Aid Fund. All money transferred to the Urban School Construction Aid Fund under this section shall be available only for transfer to the General Fund.