Choosing the right restraint is not as simple as just following the law. Children come in a variety of shapes and sizes and they also grow at different rates. While the law outlines minimum requirements, it's safest to follow the advice of experts who have created best practice guidelines.
Following best practice is as simple as continuing to use a car seat as long as a child fits in the restraint, regardless of their age.
Compared with children in dedicated child restraint systems, children in adult seatbelts are 3.5 times more likely to sustain a significant injury, particularly to the head. It is safest to keep children in their current restraint until they are too big for it.
Check all options in your child's recommended category before transitioning them to the next category of restraint to keep them as safe as possible.