Membership ends if the member:
(1) is separated from employment for more than:
(i) 4 years, if a member of the Employees’ Retirement System; or
(ii) 5 years, if a member of the Teachers’ Retirement System;
(2) withdraws the member’s accumulated contributions;
(3) transfers to the Employees’ Pension System or Teachers’ Pension System;
(4) becomes a retiree; or
(5) dies.