Cal. Government Code § 31676.98

Any county under the provisions of Section 31676.1, on the effective date of this section, whose retired employees were not included in the benefits of Section 31676.1 on the date the county or district adopted the provisions of Section 31676.1, may now include under Section 31676.1 all retirees who retired during the period of time from the establishment of such retirement system and the date such county or district passed a resolution bringing the county or district under the provisions of Section 31676.1, subject to the following conditions: (a) The benefits of this section shall not apply to any beneficiary or successor in interest of any deceased member and shall apply only to the living retired members on the date such section is adopted by resolution of the county or district. (b) No increases, cost of living adjustments or grants to such retired members shall be considered in the calculations of the retirement allowance, and only such pensions received by the retired members, computed at the date of the original retirement of the members shall be used in the computation of any such benefits. All living retired members shall have their benefits computed as general members. Calculations shall be made on the basis of current interest rates and mortality tables. (c) This section shall not decrease any such pension or retirement allowance, nor shall this section give any such retired members or their beneficiary or successor in interest, any claim against the county or district for any increases in pension or retirement allowance paid or payable for the time prior to the effective date of this section. (d) This section shall not apply to any retirement system established under the provisions of this chapter, nor to the members or retired members of such system unless and until the governing board of the county or district, adopts by majority vote, a resolution providing that this section shall become applicable in such county or district. Upon adoption the effective date shall be the first of the month following such date of adoption. A county or district upon the adoption of the benefits prescribed by this section shall determine and shall prescribe increases in employer or member rates of contribution or make such other adjustments as it deems appropriate to fully fund such benefits on a sound actuarial basis.