The Illinois Human Rights Act prohibits all public employers and private employers of 15 or more persons from discriminating in employment because of age (IL Comp. Stat. Ch. 775 Sec. 5/1-101 et seq.). The Act applies to applicants and employees who are 40 years of age and older. Under the Act, it is unlawful to:
• Refuse to hire or to discriminate with respect to recruitment, hiring, promotion, or renewal of employment on the basis of age.
• Discharge, discipline, or discriminate against any individual with respect to tenure or the terms, privileges, or conditions of employment on the basis of age.
• Make employment decisions related to selection for training or apprenticeship on the basis of age for individuals between the ages of 18 and 40 years.
• Retaliate against a person because he or she has opposed that which he or she reasonably and in good faith believes to be unlawful discrimination or because he or she has made a charge, filed a complaint, or testified, assisted, or participated in an investigation, proceeding, or hearing under the Act.
• Aid, abet, compel, or coerce a person to commit any violation of the Act.
• Willfully interfere with the state Human Rights Commission or Department or its members or representatives.