DUI Law is the same as for automobiles - .08. Indiana Trail permits are not required for out of state snowmobilers. Most snowmobile clubs have in their by-laws that snowmobilers must carry insurance. Helmets are not required. Roads open to snowmobilers varies from County to County.
Road shoulders are open to ride in most Counties.
No posted speed limits. There are 4,920 miles of groomed trails in Iowa. There are 12,550 miles of groomed trails in Maine. Trails permits are required for non-residents. Helmets are not required.