Stage 3
Booster seats raise the child up so that the seat belt fits correctly. Children who have outgrown their forward facing car seat (between 40 lb and 65 lb depending on the seat) should use a booster seat until they have reached 145 centimetres (57 inches) in height. There is no rush. It is best to keep your child in a five point harness until your child is at least 4 years old.
Always refer to the instruction manual for your car seat for specific details on weight and height limits.
Booster Seat Law for PEI Kids
The new rules are aimed at helping keep young children protected from serious injury. As of the new year, children who weigh more than 18 kg (40 lb) must be in a booster seat if they are younger than nine years old, or shorter than four feet, 145 cm (9 in). Until now, those rules were only recommendations.
Nova Scotia
Since January 1, 2007, it is the law in Nova Scotia for children that are under 4' 9" or under age 9 to be in a booster seat while traveling in a vehicle.
Booster Seats Aren't For Babies