Cal. Gov. Code § 31484.8
Notwithstanding any other provision of law, whenever the governing body of a county or district has made a particular provision or provisions of this chapter providing for increased benefits applicable to that county or district through the adoption of an ordinance or resolution, the governing body may at any time thereafter adopt another ordinance or resolution terminating the applicability of that provision or provisions as to current employees of the county or district who elect by written notice filed with the board to have the applicability of the provision or provisions terminated as to them. This section is intended only to authorize the termination of those benefits which the governing body of a county or district elected to increase over the basic benefits or to make applicable in addition to the basic benefits pursuant to the provisions of this chapter. Nothing herein shall be construed as authorizing the governing body of a county or district to terminate the basic benefits required under the provisions of this chapter.
The governing board of a county or district prior to adopting an ordinance or resolution allowing the termination of the applicability of any increased benefit provisions shall provide an oral or written explanation of the effect and impact of the termination for each member requesting termination of the applicability of any such provisions.
The governing board shall require members requesting termination of the applicability of any provisions to sign an affidavit stating that the member has been fully informed regarding the effect of the termination, and understands that the termination of a provision or provisions is irrevocable. The affidavit shall also state that the employee has chosen termination of the provision or provisions of the employee's own free will and was not coerced into termination of any provision by the employer or any other person.
The governing body shall, in the ordinance or resolution granting current employees the option of electing to have the applicability of such provision or provisions terminated, specify the provision or provisions which shall be applicable to current employees making the election. Employees who elect to have the provision or provisions terminated, shall have their retirement allowance for service rendered after the effective date of election calculated on the basis of the provision made applicable by the governing body.
The retirement allowance for service rendered prior to the effective date of the election shall be calculated on the basis of the provision or provisions applicable during that period of service. Any employee who has made such an election shall not be eligible for retirement unless the employee meets the minimum requirements of the provision or provisions applicable at the date of retirement.
A current employee who has elected to have the applicability of the provision or provisions terminated may not rescind such an election unless the governing body of the county or district again makes the particular provision or provisions applicable to the county or district through the adoption of a subsequent ordinance or resolution. Any such election made by a current employee shall be binding upon the employee's spouse and all others claiming benefits under such employee's entitlement.
An employee may make the election described herein at any time. The effective date of the election shall be the first day of the biweekly payroll period following execution and filing of the employee's affidavit.
An employee suffering a break in service shall, if he or she returns to covered employment within three years of the date of separation, return at the higher level if and only if his or her prior coverage was at that level. The provision in this paragraph applies only to separations occurring between June 30, 1983, through and including June 30, 1988, and further applies only to employees who were active members on June 30, 1983, and to employees laid off prior to that date who were on a civil service reemployment list on June 30, 1983. This provision does not apply to employees leaving the retirement system because of a change of status from full time to part time, regular appointment to project appointment and back to regular appointment, or regular appointment to intermittent appointment and back to regular appointment.
After June 30, 1988, an employee who is laid off and rehired within one year from the date of separation shall return at the higher level if and only if his or her prior coverage was at that level.
A former employee who has elected deferred retirement from the higher benefit level and who returns to covered employment shall return to the higher benefit level.
The benefit levels described in this section are those in existence on July 1, 1983.
This section shall only be applicable to a county of the fourth class as described by Sections 28020 and 28025.
Ca. Gov. Code § 31484.8