225 ILCS 2/142
All information collected by the Department in the course of an examination or investigation of a licensee or applicant, including, but not limited to, any complaint against a licensee filed with the Department and information collected to investigate any such complaint, shall be maintained for the confidential use of the Department and may not be disclosed. The Department may not disclose the information to anyone other than law enforcement officials, other regulatory agencies that have an appropriate regulatory interest as determined by the Secretary of the Department, or a party presenting a lawful subpoena to the Department. Information and documents disclosed to a federal, State, county, or local law enforcement agency may not be disclosed by the agency for any purpose to any other agency or person. A formal complaint filed by the Department against a licensee or applicant is a public record, except as otherwise prohibited by law.
225 ILCS 2/142