Mich. Comp. Laws § 408.670
An owner or operator of a carnival or amusement ride shall immediately report to the department by telephone any accident in which a fatality occurs or an individual suffers a serious injury resulting from the structural or mechanical failure of a carnival or amusement ride, or in which it appears that the construction, design, or function of the carnival or amusement ride may have directly contributed to the fatality or serious injury. If an accident occurs on a day that the department is closed, the owner shall report the incident to the department by 9 a.m. of the next business day that the department is open. The owner shall immediately remove the carnival or amusement ride from service, secure the scene of the accident, and not disturb the scene to any greater extent than is necessary for the removal of a deceased or injured individual. The ride must not be released for repair or operation until after an inspection of the ride is completed and the ride is determined to not be hazardous or unsafe.
MCL 408.670