Effective as of the date that an employer elects, as described in Section 15-158.2, to offer to its employees the portable benefit package and the self-managed plan as alternatives to the traditional benefit package, each of that employer's eligible employees (as defined in subsection (b)) shall be given the choice to elect which retirement program he or she wishes to participate in with respect to all periods of covered employment occurring on and after the effective date of the employee's election. The retirement program election made by an eligible employee must be made in writing, in the manner prescribed by the System, and within the time period described in subsection (d) or (d-1).
The employee election authorized by this Section is a one-time, irrevocable election. If an employee terminates employment after making the election provided under this subsection (a), then upon his or her subsequent re-employment with an employer the original election shall automatically apply to him or her, provided that the employer is then a participating employer as described in Section 15-158.2.
An eligible employee who fails to make this election shall, by default, participate in the traditional benefit package.
A newly eligible employee must make this election within 6 months after the date on which the System receives the report of status certification from the employer. If an employee elects to participate in the self-managed plan, no employer contributions shall be remitted to the self-managed plan when the employee's account balance transfer is made. Employer contributions to the self-managed plan shall commence as of the first pay period that begins after the System receives the employee's election.
40 ILCS 5/15-134.5