Ill. Admin. Code tit. 56 § 2510.20
Section 2-102 of the Illinois Human Rights Act (Ill. Rev. Stat. 1981, ch. 68, pars. 2-102), prohibits discrimination in employment in Illinois by employers, labor organizations and employment agencies. Under Section 1-103(Q) of the Act, unlawful discrimination includes discrimination based upon a person's "unfavorable discharge from military service." Section 1-103(P) of the Act defines an unfavorable military discharge as encompassing any discharge, from any component of the United States military service, which is less than honorable but not "Dishonorable." A person who has received a military discharge falling within those parameters may not, as a result thereof, be subjected to discrimination except as permitted in an exemption to the Act.
Ill. Admin. Code tit. 56, § 2510.20