(40 ILCS 5/21-102.20) (from Ch. 108 1/2, par. 21-102.20)
    Sec. 21-102.20. Mandatory Social Security Coverage. "Mandatory Social Security coverage" means the coverage in the federal Social Security System that is required under Section 210 of the federal Social Security Act for certain State and local government personnel who are not members of a State or local governmental retirement system.
(Source: P.A. 87-11.)