Maine car seat laws require children to ride in a rear-facing seat until age 2, a forward-facing harnessed seat until they reach 55 pounds, a belt-positioning booster until they are at least 8 years old, 57 inches tall, or 80 pounds, and a regular seat belt from that point until they turn 18. Children under 12 who weigh less than 100 pounds must also ride in the back seat when the vehicle has one. The rules come from Title 29-A, Section 2081 of the Maine Revised Statutes, and the driver is responsible for making sure each child is properly restrained.1Maine Legislature. Maine Code Title 29-A Section 2081 – Use of Safety Seat Belts and Child Restraint Systems
Rear-Facing Until Age 2
Children under two must ride in a rear-facing child restraint system, or in a convertible seat installed in the rear-facing position. The seat has to be secured according to both the car seat manufacturer’s instructions and the vehicle manufacturer’s instructions.1Maine Legislature. Maine Code Title 29-A Section 2081 – Use of Safety Seat Belts and Child Restraint Systems
There is one exception. If a child in a convertible seat exceeds the manufacturer’s weight or height limit for the rear-facing position, the child may ride forward-facing in that same convertible seat before turning two, provided the seat is used according to its instructions. This applies only when the seat itself cannot safely accommodate the child rear-facing.1Maine Legislature. Maine Code Title 29-A Section 2081 – Use of Safety Seat Belts and Child Restraint Systems
Forward-Facing Harnessed Seat From Age 2 to 55 Pounds
Once a child is at least two years old but weighs less than 55 pounds, Maine law requires a child restraint system with an internal harness. If the child outgrows the seat’s height limit before reaching 55 pounds, the driver must move the child into a federally approved belt-positioning booster.1Maine Legislature. Maine Code Title 29-A Section 2081 – Use of Safety Seat Belts and Child Restraint Systems
The weight threshold in Maine is 55 pounds, not 40. Parents who switch to a booster at 40 pounds, as some other states allow, are moving their child out of the harness earlier than Maine’s law permits.
Booster Seat Requirements
A child needs a belt-positioning booster (or another child restraint system) when all three of the following are true at once: the child weighs less than 80 pounds, is shorter than 57 inches, and is younger than 8. Once any one of those thresholds is crossed, the child can move to a regular seat belt.1Maine Legislature. Maine Code Title 29-A Section 2081 – Use of Safety Seat Belts and Child Restraint Systems
So a small seven-year-old weighing 50 pounds and standing 48 inches still needs a booster. A tall six-year-old who has already hit 57 inches does not.
Seat Belts Until 18
Children who have outgrown the booster requirement still must wear a seat belt every time they ride, and the driver is responsible for making sure every passenger under 18 is buckled, wherever they sit in the vehicle.1Maine Legislature. Maine Code Title 29-A Section 2081 – Use of Safety Seat Belts and Child Restraint Systems
Back Seat Rule for Children Under 12
Any child who is under 12 and weighs less than 100 pounds must ride in the rear seat when one is available. The statute uses the phrase “if possible,” so the rule does not apply to vehicles with no rear seat, like certain pickups or two-seat cars.2Maine State Legislature. Maine Code Title 29-A Section 2081 – Child Passenger Safety A rear-facing car seat should never be placed in front of an active airbag, and NHTSA recommends keeping all children under 13 in the back seat.3National Highway Traffic Safety Administration. Air Bags
Medical Exemption
If a child has a medical condition that makes the standard restraint requirements unsafe, a physician, nurse practitioner, physician associate, or a certified child passenger safety technician with special needs training can issue a written opinion recommending a different restraint system. The opinion has to explain the medical basis and identify a specific alternative, and the driver then has to use that system and follow its manufacturer’s instructions.1Maine Legislature. Maine Code Title 29-A Section 2081 – Use of Safety Seat Belts and Child Restraint Systems
Uber, Lyft, and Taxis
Maine’s child restraint requirements apply in any motor vehicle equipped with seat belts. Rideshare and taxi trips are not exempt. A child under two still needs a rear-facing seat, a child under 55 pounds still needs a harness, and so on. Rideshare drivers do not carry car seats, so parents need to bring their own; if a child does not have a proper restraint, the driver can refuse the trip.
Fines for Violations
A child restraint or seat belt violation is a civil traffic infraction with escalating fines:
- First offense: $50
- Second offense: $125
- Third and subsequent offenses: $250
These fines cannot be suspended by the court. The statute is explicit that a judge has no discretion to waive or reduce the fine once a violation is established. Because it is a civil infraction rather than a criminal charge, there is no jail time or criminal record. Law enforcement also cannot search a vehicle solely because of a seat belt violation.1Maine Legislature. Maine Code Title 29-A Section 2081 – Use of Safety Seat Belts and Child Restraint Systems
Free Car Seat Inspections
If you are unsure whether your seat is installed correctly, the Maine Bureau of Highway Safety runs a network of car seat inspection and distribution sites across the state. Certified child passenger safety technicians at fire departments, hospitals, and police stations can check the installation, help adjust the harness, and in some cases provide a seat if you need one. Appointments are required and there may be a waiting list. You can reach the Bureau at 207-626-3840 or find a location through the Department of Public Safety website.4Maine Department of Public Safety. Car Seat Inspection Locations It’s also worth registering the seat with the manufacturer, so you’ll be notified directly if it’s recalled.