All information collected by the Department in the course of an examination or investigation of a registrant or applicant, including, but not limited to, any complaint against a registrant 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, 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 registrant or applicant is a public record, except as otherwise prohibited by law.