Mich. Comp. Laws § 257.38a

Sec. 38a. "Park model trailer" means a vehicle that meets all of the following: (a) Is built on a single chassis, mounted on wheels, and designed to be towed by a motor vehicle from time to time. (b) Depending on its size, may require a special highway movement permit under section 719a to be towed on a street or highway. (c) Is designed to provide recreational, seasonal, or temporary living quarters. (d) When used as recreational, seasonal, or temporary living quarters, may be connected to utilities necessary for the operation of installed fixtures and appliances. (e) Is not a mobile home as that term is defined in section 2 of the mobile home commission act, 1987 PA 96, MCL 125.2302.