Section 40 ILCS 5/9-120 - Persons to whom article does not applyThis Article does not apply to:
(a) Any person whose position will not ordinarily permit service during one month in a calendar year, nor to any person who is age 65 or over when he enters service unless such a person elects to have this Article apply by filing written notice of such intent with the retirement board within 4 months after the date of entering service. Any person to whom this Article did not apply because of the age 65 limitation may file such written notice within 4 months of the effective date of this Amendatory Act. Such a person may establish credit for any periods for which this Article did not apply by making the employee contributions which would have been required had this Article applied to such person together with interest.(b) Any person who becomes an employee after June 30, 1979 as a public service employment program participant under the Federal Comprehensive Employment and Training Act and whose wages or fringe benefits are paid in whole or in part by funds provided under such Act.