Is my child big enough for a seat belt? Even if your child is 8 and it is legal for them to stop using a booster seat, if they are under 4 feet 9 inches tall, you should continue to use a booster seat to keep your child safe. Ohio Car Seat Laws 2021 Current Laws Safety Resources For Parents - Safe Convertible Car Seats Children aged from seven years old but under 16 years old who are too small to be restrained by a seatbelt properly. When can a child stop using a booster seat in nebraska . Integrated booster seats have already been built into the seat of the car and can be adjusted so that an adult or a child aged 4 years or older can travel in the seat. State laws regulate when it’s legal for kids to stop riding in car safety seats or boosters, and those laws vary from state to state based on age, height and/or weight. Child restraint or booster seat until your child is 148cm tall (this is usually when they’re around 11 or 12 years old). Any child who's five or six ye...