Mich. Comp. Laws § 289.3121

Sec. 3121. (1) The department or a local health department shall conduct evaluations in compliance with this act. (2) Records for all of the following shall be maintained by a local health department: (a) Applications for licensure. (b) Operation licenses. (c) Evaluation reports. (d) Pertinent correspondence. (e) Plans and specifications. (f) Administrative actions. (g) Other applicable information relating to the operation of each food service establishment. (3) A local health department shall maintain a record of all consumer complaints, the ensuing investigation, and the result of the complaint. (4) All department and local health department records shall be retained in accordance with the records retention schedule of the department.