Seat Belt Laws
The Montana Seatbelt Use Act requires the use of seatbelts by the driver and each occupant of each vehicle. State law also requires child safety restraint systems for children under the age of 6 or weighing less than 60 pounds. A few drivers and passengers are excluded from the law (see Exemptions below), including people unable to use seatbelts due to a medical condition.
At this time, Montana does not have a "primary" seatbelt law. Under primary laws, law enforcement personnel may make traffic stops solely for failure to use a seatbelt.
The penalty for failure to use a seatbelt is $20. The penalty is not counted as a misdemeanor, it may not be counted as a moving violation—for purposes of suspending a driver's license, for example—and it is not counted against a driver's record.
The penalty for failure to use a child safety restraint system is a fine of not more than $100.