Mich. Comp. Laws § 431.325
To the extent information is disclosed by any race meeting licensee under this act regarding the name, address, or any other personal information, including financial information, of any patron of the licensee, neither the office of the racing commissioner nor any other governmental authority to whom disclosure has been made shall disclose that information. All information provided to the office of racing commissioner or any other governmental authority by a race meeting licensee that in any manner discloses the name, address, or any other personal information, including financial information, of any patron of the licensee is considered confidential, and is not subject to disclosure under the freedom of information act, Act No. 442 of the Public Acts of 1976, being sections 15.231 to 15.246 of the Michigan Compiled Laws.
MCL 431.325