Mich. Comp. Laws § 324.80135: Casualty involving vessel; report.

Sec. 80135.

In the case of collision, accident, or other casualty involving a vessel, the operator shall report the collision, accident, or other casualty to the nearest peace officer, state police post, or the sheriff of the county in which the collision, accident, or other casualty occurred.

A report of a collision, accident, or other casualty involving a vessel that is made to a peace officer other than the sheriff of the county in which the collision, accident, or other casualty occurred shall be reported without delay by the peace officer to the sheriff of the county in which the collision, accident, or other casualty occurred.