820 ILCS 219/125: Confidentiality of trade secrets.

(a) All information reported to or otherwise obtained by the Director or the Director's authorized representative in connection with any inspection or proceeding under this Act or any standard, rule, regulation, or order adopted or issued under this Act which contains or might reveal a trade secret shall be considered confidential, except that such information may be disclosed confidentially to other officers or employees concerned with carrying out this Act or when relevant to any proceeding under this Act. In any such proceeding, the Director or the court shall issue such orders as may be appropriate, including an order for the impoundment of files or portions of files, to protect the confidentiality of trade secrets.

(b) A person who discloses a trade secret in violation of this Section commits a Class B misdemeanor.