Government Code section 31557
(a)
In the case of districts for which the board of supervisors is the governing body, such body adopts by four-fifths vote a resolution providing for the inclusion of the district in the retirement association.(b)
In the case of districts for which the board of supervisors is not the governing body, the governing body adopts by a two-thirds vote, a resolution providing for the inclusion of the district in the retirement association and the board, by majority vote, consents thereto. Thereafter, each person entering such employment becomes a member on the first day of the calendar month following his entrance into the service. However, if prior to January 1, 1976, the governing body and the board of retirement have executed an agreement providing for the purchase of prior service, the agreement may be amended to provide that the date of membership in the retirement association for any officer or employee shall be the first day of the calendar month following the officer’s or employee’s entrance into district service.
Source:
Section 31557, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=31557. (accessed May 26, 2025).