Cal. Government Code § 22960.60

(a) Employer and employee contribution rates may be determined by the terms of the memorandum of understanding applicable to each plan participant and the employer in accordance with the requirements of this section. (b) Through the Department of Human Resources, the employer shall provide the board with a true and correct copy of each memorandum of understanding applicable to plan participants. The board may prescribe procedures for the orderly transmittal and receipt of these documents. (c) Except as provided in subdivision (e), after receipt of an applicable memorandum of understanding that sets forth an employer contribution rate and any employee contribution rate, the board shall, in accordance with Section 22960.36, amend the plan to provide for the employer contribution rate and any employee contribution rate set forth in the memorandum of understanding. (d) The employer contribution rate and any employee contribution rate for state peace officers and firefighters who have become subject to this part pursuant to the provisions of subdivision (b) of Section 22960 shall be the contribution rate or rates set forth in the memorandum of understanding for state peace officers and firefighter members in Bargaining Unit 6. (e) The board may refuse to amend the plan under this section if, in the board’s considered judgment, the proposed amendment would violate any applicable provision of Title 26 of the United States Code. (f) The initial employer contribution rate shall be prescribed in the memorandum of understanding. In the event an MOU expires and no new memorandums of understanding takes effect, the last memorandums of understanding in place shall control.