Gov. Code, § 17613

(a) The Director of Finance may authorize the augmentation of the amount available for expenditure to reimburse costs mandated by the state, as defined in Section 17514, as follows:

(1) For augmentation of (A) any schedule in any item to reimburse costs mandated by the state in any budget act, or (B) the amount appropriated in a local government claims bill for reimbursement of the claims of local agencies, as defined by Section 17518, from the unencumbered balance of any other item to reimburse costs mandated by the state in that budget act or another budget act or in an appropriation for reimbursement of the claims of local agencies in another local government claims bill.

(2) For augmentation of (A) any schedule in any budget act item, or (B) any amount appropriated in a local government claims bill, when either of these augmentations is for reimbursement of mandated claims of school districts, as defined in Section 17519, when the source of this augmentation is (A) the unencumbered balance of any other scheduled amount in that budget act or another budget act, or (B) an appropriation in another local government claims bill, when either of these appropriations is for reimbursement of mandate claims of school districts. This paragraph applies only to appropriations that are made for the purpose of meeting the minimum funding guarantee for educational programs pursuant to Section 8 of Article XVI of the California Constitution.

(b) No authorization for an augmentation pursuant to this section may be made sooner than 30 days after the notification in writing of the necessity therefor to the chairperson of the committee in each house which considers appropriations and the chairperson of the Joint Legislative Budget Committee, or not sooner than whatever lesser time as the chairperson of the joint committee, or his or her designee, may in each instance determine.