Ill. Admin. Code tit. 62, § 245.720
c) Upon submission or within 5 calendar days after submission of the master list of chemicals with chemical disclosure information to the Department under Section 245.210, 245.700, 245.710 or 245.860 under a claim of trade secret, the person that claimed trade secret protection ("claimant") shall provide a justification of the claim containing an affidavit swearing or affirming under penalty of perjury, that the information is a bona fide trade secret. The affidavit shall include:
3) identification of the claimant's specific use of the chemicals claimed as trade secret and explanation of why it is a secret of interest to competitors, including the following:
d) Chemical disclosure information furnished under Section 245.210, 245.700, 245.710 or 245.860 under a claim of trade secret shall be protected from disclosure as a trade secret if the Department determines that the statement of justification demonstrates that (Section 1-77(h) of the Act):