Ill. Admin. Code tit. 4, § 575.40
b) Filing Grievance. A grievance shall be filed with the Department not later than 180 calendar days from the date of the alleged discrimination. The complaint shall be submitted on the Department's grievance form which can be obtained by contacting the Department's Designated Coordinator. The grievance form shall be sent by certified mail, return receipt requested within 5 working days after receipt of the request.
1) The grievance form shall include:
2) If the grievance is based on the denial of a requested reasonable modification, the following information shall also be completed on the form: