The UK law states that children must use a car seat until they are 12 years old or 135 cm tall, whichever comes first. In the US, all children must be properly restrained in a federally approved child safety seat appropriate for the child's age, weight and height up to eight years of age or 65 lbs, whichever comes first. Children who are at least 8 years of age or weigh 65 lbs but younger than 16 must be properly restrained in a vehicle's seat belt. In all EU countries, safety regulations R44 or R129/i-Size apply, which state that you must use a car seat with an approval label or sticker for the child's appropriate weight and height.