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.

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.