Mich. Comp. Laws § 500.130

Sec. 130. (1) A peer-to-peer car sharing program has an insurable interest in a shared vehicle during the car sharing period. (2) A peer–to–peer car sharing program may own and maintain as the named insured 1 or more policies of automobile insurance that provide coverage for any of the following: (a) Liabilities assumed by the peer–to–peer car sharing program under a car sharing program agreement. (b) Any liability of the shared vehicle owner. (c) Damage or loss to the shared vehicle. (d) Any liability of the shared vehicle driver. (3) A peer-to-peer car sharing program shall not do any of the following: (a) Unless authorized, offer or sell insurance, except travel or auto-related insurance offered or sold in connection with and incidental to the sharing of a motor vehicle under a car sharing program agreement. (b) Make a car sharing program agreement contingent on the shared vehicle driver purchasing residual third-party liability insurance through the peer-to-peer car sharing program. (4) As used in this section, "car sharing period", "car sharing program agreement", "peer-to-peer car sharing program", "shared vehicle", "shared vehicle driver", and "shared vehicle owner" mean those terms as defined in section 3 of the peer-to-peer car sharing program act.