Mich. Comp. Laws § 331.1260

Sec. 260. A writing prepared, owned, used, in the possession of, or retained by a board of trustees or subsidiary board of a corporation incorporated by a city or village in the performance of an official function shall be made available to the public in compliance with 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. This section does not abrogate any confidentiality provisions established by state or federal law, including, but not limited to, those pertaining to the provision or review of health services.