Under the Highway Safety Code, in a moving vehicle, children whose sitting height is less than 63 cm (measured from the seat to the top of the head) must ride in a child car seat that is suitable for the child's weight (infant seat, child seat or booster seat).
Before deciding to no longer use a child car seat, check the child's position on the rear seat of the vehicle:
Why?
Children who are not tall enough and whose legs are too short will tend to slide under the seat belt and move forward to bend the knees over the edge of the seat to get comfortable. In an accident, this could lead to serious injuries to the spine or internal organs because the seat belt is pressing against the abdomen rather than on the hips.
Children who cannot use a seat belt safely by themselves should continue to use a booster seat suitable for their height and weight, even if they have a sitting height of 63 cm.
Transport Canada and the Société de l'assurance automobile du Québec recommend that children aged 12 and under be placed on the rear seat of the vehicle. This is the safest place for them in the vehicle because they are seated as far away as possible from points of impact in the event of an accident.