Cal. Government Code § 20791

(a) The board shall define a significant increase in actuarial liability due to increased compensation paid to a nonrepresented employee and shall implement program changes to ensure that a contracting agency that creates the significant increase in actuarial liability bears the increased liability, including any portion of that liability that otherwise would be borne by another contracting agency or agencies. (b) Upon determining the significant increase in actuarial liability, the system actuary shall assess the increase to the employer that created it and adjust that employer’s rates to account for the increased liability. (c) This section shall not apply to compensation paid to an employee for service performed while covered by a memorandum of understanding or to compensation paid for service performed while a member of a recognized employee organization as that term is defined in Section 3501. (d) This section shall apply to any significant increase in actuarial liability, due to increased compensation paid to a nonrepresented employee, that is determined after January 1, 2013, regardless of when that increase in compensation occurred.