Cal. Government Code § 19820

The director shall adopt general rules and regulations doing all of the following: (a) Limiting the amount, time, and place of expenses and allowances to be paid to officers, employees, experts, and agents of the state while traveling on official state business. The rules and regulations shall provide for reasonable reimbursement to an officer, employee, expert, or agent of the state for expenses incurred by them to repair a privately owned vehicle which was damaged through no fault of the officer, employee, expert, or agent, if the damage occurred while the vehicle was used on official state business with the permission or authorization of an employing agency. As used in this subdivision, “officers and employees of the state” means all officers and employees of the state other than elected state officers, officers and employees of the state provided for in Article VI of the California Constitution, and officers and employees of the California State University. “Officers and employees of the state” is not limited by subdivision (d) of Section 19815. (b) Governing those matters as are specifically committed to the jurisdiction of the department. (c) Governing the computation of pay in the case of any employee who is entitled to less than their regular rate of pay for a pay period. If this section is in conflict with a memorandum of understanding reached pursuant to Section 3517.5, the memorandum of understanding shall be controlling without further legislative action, except that if any conflicting provision of a memorandum of understanding requires the expenditure of funds, that provision shall not become effective unless approved by the Legislature in the annual Budget Act.