In counties adopting Section 31676.12, the normal rates of contribution, except for members covered by Article 6.8 (commencing with Section 31639) of this chapter, shall be such as will provide an annual annuity at age 60 equal to one two-hundredth of the final compensation of members not covered by Article 6.8, according to tables adopted by the board of supervisors, for each year of service rendered after entering the system.
This section may be made applicable in such counties, on the first day of the month after the board of supervisors of such county adopts, by majority vote, a resolution providing that this section shall become applicable in such county.
Ca. Gov. Code § 31621.5