Gov. Code, § 25000

(a) Each county shall have a board of supervisors consisting of five members. Not more than three members shall be elected at the same general election. If the terms of office of more than three members of the board expire at the same time, at the first regular meeting after January 1st following their election the members so elected shall so classify themselves by lot that three members shall serve for four years, and two for two years. Thereafter the term of office of each member shall be four years.

(b) (1) Notwithstanding any other provision of law, the board of supervisors of any general law or charter county may adopt or the residents of the county may propose, by initiative, a proposal to limit to no fewer than two terms or repeal a limit on the number of terms a member of the board of supervisors may serve on the board of supervisors. Any proposal to limit the number of terms a member of the board of supervisors may serve on the board of supervisors shall apply prospectively only and shall not become operative unless it is submitted to the electors of the county at a regularly scheduled election and a majority of the votes cast on the question favor the adoption of the proposal.

(2) The changes made to this subdivision by the act that added this paragraph shall not affect any term limits that were legally in effect prior to January 1, 2022, in any county.