California Code, Government Code - GOV § 20814

(a) Notwithstanding any other provision of law, the state's contribution under this chapter shall be adjusted from time to time in the annual Budget Act according to the following method:  as part of the proposed budget, the Governor shall include the contribution rates adopted by the board for the liability of benefits on account of employees of the state.  The Legislature shall adopt the board's contribution rates and authorize the appropriation in the Budget Act.

(b) In the event a memorandum of understanding goes into effect pursuant to the Ralph C. Dills Act (Chapter 10.3 (commencing with Section 3512) of Division 4 of Title 1) that was not previously considered by the board in adopting its most recent annual employer contribution rates and that memorandum of understanding contains a change in employee retirement contributions, benefits, or pension plan design, including a change that alters a state employee's retirement contributions, or there is a change in unrepresented employees' retirement contributions, benefits, or pension plan design to be consistent with those of related classifications and groups of represented employees, the board may, in its discretion, adopt new quarterly employer contribution rates for future contributions for the state plans to reflect these changes.  If the board adopts new rates for the state plans to reflect a change in employee retirement contributions, benefits, or pension plan design, the Director of Finance shall reduce or increase the percentage levels of the state's retirement contribution to reflect the new rates.  Nothing in this section shall require the board to take action as described herein unless the board determines, in good faith, that the action described herein is consistent with the fiduciary responsibilities of the board described in Section 17 of Article XVI of the California Constitution.

(c) The employer contribution rates for all other public employers under this system shall be determined on an annual basis by the actuary and shall be effective on the July 1 following notice of a change in rate.