Ill. Admin. Code tit. 92, § 3280.1320
b) Each application filed under this Section for an exemption must:
1) Be submitted to:
Director, Division of Traffic Safety
Illinois Department of Transportation
P.O. Box 19212
1340 N. 9th St.
Springfield, Illinois 62794-9212;
12) State the reasons why the applicant believes the requested exemption, including any safety control measures specified by the applicant, will achieve a level of safety that:
j) A letter of denial containing a statement of the reasons why the applicant has not been granted an exemption and the provisions of Subpart C that support the denial will be mailed to applicants denied exemptions. Applicants denied an exemption may:
k) At any time there is a material change in the application or in any information relevant to the exemption, the applicant shall promptly notify the Division. Failure to notify the Division will result in termination of the exemption.
(Recodified from 92 Ill. Adm. Code 386 (Department of Transportation) pursuant to P.A. 104-0025, at 49 Ill. Reg. 12543)