Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.80207

Sec. 80207. The owner of a personal watercraft is liable for any injury occasioned by the negligent operation of the personal watercraft, whether the negligence consists of a violation of the statutes of this state, or in the failure to observe the ordinary care in the operation that the rules of the common law require. The owner is not liable unless the personal watercraft is being used with his or her expressed or implied consent. It shall be rebuttably presumed that the personal watercraft is being operated with the knowledge and consent of the owner if it is driven at the time of the injury by his or her son, daughter, spouse, father, mother, brother, sister, or other immediate member of the owner's family.