GOV §31681.54: (a) Except as provided in subdivision (b) of this section, a retirement allowance or optional death allowance, including an allowance payable to a survivor of a member, payable to or on account of any

(a) Except as provided in subdivision (b) of this section, a retirement allowance or optional death allowance, including an allowance payable to a survivor of a member, payable to or on account of any member of this system, or of a superseded system, who retired for service on or before December 31, 1971, is hereby increased as follows: Number of Years of Percentage of Increase in County or District Monthly Retirement Service Allowance 25 or more years 10% 20–25 years 8% 15–20 years 6% 10–15 years 4% (b) No allowance shall be increased to more than five hundred dollars ($500) per month pursuant to subdivision (a) of this section. This section shall not be operative in any county until such time as the board of supervisors shall, by resolution adopted by majority vote, make the provisions of this section applicable in such county.