California Code, Government Code - GOV § 20471.2

(a) A county and a trial court that elect to separate the joint contract into individual contracts shall do so by ordinances or resolutions adopted by both the affirmative vote of a majority of the members of the governing body of a county and the presiding officer of the trial court. In order to be effective, the resolution of the presiding officer of the trial court and the resolution or ordinance of the governing body of the county shall be adopted within 30 days of each other.

(b) The separation shall not be a cause for the modification of employment retirement benefits. The retirement benefit levels provided to employees under the joint contract shall not be modified until after expiration of an existing memorandum of understanding or agreement or a period of 24 months, whichever is longer, unless the county and its recognized employee organizations or the trial court and its recognized employee organizations mutually agree to a modification.

(c) Following the separation of the joint contract, any plan under separate contract that has under 100 active members, or otherwise meets applicable board criteria, shall participate in a risk pool pursuant to Section 20840.

(d) An election made pursuant to this section shall be irrevocable, and, upon separation of the joint contract, the county and trial court shall be ineligible to reestablish a joint contract.