40 ILCS 5/9-120.1
2021 Illinois Compiled Statutes|Chapter 40 - PENSIONS|40 ILCS 5/ - Illinois Pension Code.|Article 9 - County Employees' and Officers' Annuity and Benefit Fund - Counties Over 3,000,000 Inhabitants

Sec. 9-120.1.     CTA - continued participation; military service credit.(a) A person who (i) has at least 20 years of creditable service in the  Fund, (ii) has not begun receiving a retirement annuity under this Article,  and (iii) is employed in a position under which he or she is eligible to  actively participate in the retirement system established under Section 22-101  of this Code may elect, after he or she ceases to be a participant but in no  event after June 1, 1998, to continue his or her participation in this Fund  while employed by the Chicago Transit Authority, for up to 10 additional years,  by making written application to the Board.(b) A person who elects to continue participation under this Section shall  make contributions directly to the Fund, not less frequently than monthly,  based on the person's actual Chicago Transit Authority compensation and the  rates applicable to employees under this Fund.  Creditable service shall be  granted to any person for the period, not exceeding 10 years, during which the  person continues participation in this Fund under this Section and continues to  make contributions as required.  For periods of service established under this  Section, the person's actual Chicago Transit Authority compensation shall be  considered his or her salary for purposes of calculating benefits under this  Article.(c) A person who elects to continue participation under this Section may  cancel that election at any time.(d) A person who elects to continue participation under this Section may  establish service credit in this Fund for periods of employment by the Chicago  Transit Authority prior to that election, by applying in writing and paying to  the Fund an amount representing employee contributions for the service being  established, based on the person's actual Chicago Transit Authority  compensation and the rates then applicable to employees under this Fund,  without interest.(e) A person who qualifies under this Section may elect to purchase  credit for up to 4 years of military service, whether or not that  service followed service as a county employee.  The military service need  not have been served in wartime, but the employee must not have been  dishonorably discharged.  To establish this creditable service the  applicant must pay to the Fund, on or before July 1, 1998, an amount determined  by the Fund to represent the employee contributions for the creditable service,  based on the employee's rate of compensation on his or her last day of service  as a contributor before the military service or his or her  salary on the first day of service following the military service, whichever is  greater, plus interest at the effective rate from the date of discharge to the  date of payment.  For the purposes of this subsection, "military service"  includes service in the United States armed forces reserves.(f) Notwithstanding any other provision of this Section, a person may not  establish creditable service under this Section for any period for which the  person receives credit under any other public employee retirement system,  including the retirement system established under Section 22-101 of this Code,  unless the credit under that retirement system has been irrevocably  relinquished.    (Source: P.A. 90-32, eff. 6-27-97.)