GOV §31639.95: (a) This section shall only apply to the retirement system of Contra Costa County and only if the board of supervisors of that county adopts, by majority vote, a resolution making this section applica

(a) This section shall only apply to the retirement system of Contra Costa County and only if the board of supervisors of that county adopts, by majority vote, a resolution making this section applicable in the county. Notwithstanding any other provision of law, the board of supervisors may make this section applicable in the county on a date specified in the resolution, which date may be different than the date of the resolution. (b) (1) When the board of supervisors meets and confers pursuant to the Meyers-Milias-Brown Act (Chapter 10 (commencing with Section 3500) of Division 4 of Title 1) with any recognized employee organization that represents county employees who are safety members, the parties may agree, pursuant to a memorandum of understanding, to any of the following: (A) Whether the employees shall be required to pay all or part of the employer’s contributions required to fund the benefits of Section 31664.1, the amount or percentage of that contribution, the method that the contribution is made, and the commencement date, which may predate the effective date of the memorandum of understanding. (B) Subject to an agreement reached pursuant to Section 31484.9, whether the employees shall be required to pay all or part of the employer’s contributions required to fund the benefits of Section 31664.2, the amount or percentage of that contribution, the method that the contribution is made, and the commencement date, which may predate the effective date of the memorandum of understanding. (C) Changing any of those conditions described in subparagraph (A) or (B), including, but not limited to, increasing or reducing, for any years, the portion and the amount of the employer’s contributions that employees are required to pay. (2) The terms of any agreements reached with a recognized employee organization pursuant to this subdivision may be made applicable by the board of supervisors to unrepresented county employees who are safety members. (c) (1) After the board of supervisors has adopted the resolution described in subdivision (a), the governing body of a district within the county may make this section applicable to its employees who are safety members pursuant to a memorandum of understanding under the Meyers-Milias-Brown Act with any recognized employee organization that represents district employees who are safety members on any of the matters described in subdivision (b). (2) The terms of any agreements reached with a recognized employee organization pursuant to this subdivision may be made applicable by the governing body of the district to unrepresented district employees who are safety members. (d) Any contributions paid by a member pursuant to this section shall be deemed to be part of the member’s accumulated contributions.