At what age must children be held in an approved child restraint system?

The requirement for children to be secured in an approved child restraint system is based on their age and is designed to enhance their safety while traveling in a vehicle. In this context, the correct age limit is 6 years old and below, meaning all children who are 6 years old or younger must be restrained in a suitable child safety seat.

This regulation is established to ensure adequate protection for younger passengers, as their developing bodies are more vulnerable in the event of a car accident. Child restraint systems are designed to provide the proper support and positioning to minimize injury risks, as standard seat belts are not deemed safe for small children.

In contrast, the other choices suggest an older age limit, which would not comply with the safety regulations aimed at protecting younger, more vulnerable passengers. Therefore, adhering to the law that specifies a maximum age of 6 years for the use of child restraint systems is essential for ensuring children's safety on the road.