Wherever in this chapter the rights of a member, because of membership in another retirement system, are conditioned upon reemployment within a specified period after termination of employment covered by a system under this chapter or another retirement system, the period shall be one year in the case of any member who was reemployed on or after January 1, 1989, and whose termination of employment was due to layoff because of, a lack of work, a lack of funds, or a reduction in workforce.

This section shall not be operative in any county until the time that the board of supervisors, by resolution adopted by a majority vote, makes the provision applicable in that county.