Provides within ninety days of the date that a member either changes employers or resumes employment after a separation from service from an employer of no fewer than one and one-half months, he or she has the option to irrevocably choose membership in PERS, TRS, or SERS plan 2 or plan 3 for the duration of the member's continuous employment with an employer. For members of plan 3 this ninety-day period runs simultaneously with the ninety-day period provided for choosing a contribution rate provided in RCW 41.34.040(3)(d). At the end of ninety days, if the member has not made a choice to change plans, the member remains a member of plan 2 or plan 3, as established in his or her most recent period of employment with an employer.