215 ILCS 5/462
Every rating organization, and every company which does not adopt the rates of a rating organization, shall, within a reasonable time after receiving written request therefor, furnish to any insured affected by a rate made by it, or to the authorized representative of such insured, in readily understandable language, all pertinent information as to such rate as specified in rules adopted by the Department.
Every rating organization, and every company which does not adopt the rates of a rating organization, shall provide within this state reasonable means whereby any person aggrieved by the application of its rating system may be heard, in person or by his authorized representative, on his written request to review the manner in which such rating system has been applied in connection with the insurance afforded him. If the rating organization or company fails to grant or reject such request within thirty days after it is made, the applicant may proceed in the same manner as if his application had been rejected. Any party affected by the action of such rating organization or such company on such request may, within thirty days after written notice of such action, appeal to the Director, who, after a hearing held upon not less than ten days' written notice to the appellant and to such rating organization or company, may affirm or reverse such action.
215 ILCS 5/462