Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.82103

Sec. 82103. (1) Except as otherwise provided in this part, a snowmobile must not be operated unless the owner first obtains a certificate of registration and a registration decal. The certificate of registration must be secured at the time of purchase or transfer of ownership. A certificate of registration or a registration decal is not required for a snowmobile operated exclusively on lands owned or under the control of the snowmobile owner or for a snowmobile used entirely in a safety education and training program conducted by a certified snowmobile safety instructor and authorized under section 82108.  1

(2) A person who is convicted of a violation of this section shall be fined not more than $50.00.

(3) Notwithstanding any provision of this part to the contrary, before the start of each snowmobile season, the department shall designate 1 weekend in that snowmobile season during which registration under this part is not required to operate a snowmobile on snowmobile trails.