Cal. Government Code § 22871

(a) The employer contribution, with respect to each employee or annuitant who is in the employment of or retired from service with the state, including an academic position with the California State University, or is a survivor of that person, shall be adjusted by the Legislature in the annual Budget Act. Those adjustments shall be based on the principle that the employer contribution for each employee or annuitant shall be an amount equal to 100 percent of the weighted average of the health benefit plan premiums for an employee or annuitant enrolled for self-alone, during the benefit year to which the formula is applied, for the four health benefit plans that had the largest state enrollment, excluding family members, during the previous benefit year. For each employee or annuitant with enrolled family members, the employer shall contribute an additional 90 percent of the weighted average of the additional premiums required for enrollment of those family members, during the benefit year to which the formula is applied, in the four health benefit plans that had the largest state enrollment, excluding family members, during the previous benefit year. Only the enrollment of, and premiums paid by, state employees and annuitants enrolled in a basic health benefit plan shall be counted for purposes of calculating the employer contribution under this section. (b) If the provisions of this section are in conflict with the provisions of a memorandum of understanding reached pursuant to Section 3517.5 or Chapter 12 (commencing with Section 3560) of Division 4 of Title 1, the memorandum of understanding shall be controlling without further legislative action, except that if those provisions require the expenditure of funds, the provisions may not become effective unless approved by the Legislature.