Minn. Stat. § 84.9257: PASSENGERS.

(a) A person 18 years of age or older may operate a class 1 all-terrain vehicle carrying only one passenger.

(b) A person 18 years of age or older may operate a class 2 all-terrain vehicle while carrying only one passenger, or up to the number of passengers for which the vehicle was designed, whichever is greater.

(c) A person 12 to 17 years of age may operate a class 1 all-terrain vehicle carrying only one passenger and the passenger must be the person's parent or legal guardian.