Ill. Admin. Code tit. 14 § 528.120
The Department will not permit public inspection or copying of any material that is or would be confidential under State law, specifically including the exemptions set forth in the Freedom of Information Act [5 ILCS 140 ]. If an applicant submits information it considers to be of a confidential nature as part of its application or request for a tax credit certificate, such information shall be marked or labeled "CONFIDENTIAL" in capital letters. The applicant shall also submit a statement briefly setting forth the grounds on which the information should be treated as confidential. The Department, based on the propriety nature of the material and privacy of the applicant's confidential information, shall not disclose the materials to the public.
Ill. Admin. Code tit. 14, § 528.120
Added at 31 Ill. Reg. 2253, effective January 18, 2007