一定要的，規定如下： Booster Seat (2)Group 2 15-25 kgs (33-55 lbs)4 years to 6 years Booster SeatGroup 2 and 3 15-36 kgs (33-79 lbs)4 years to 11 years Booster SeatGroup 1, 2 and 3 9-36 kgs (20-79 lbs)9 months to 11 years Booster Cushion (2)Group 3 22-36 kgs (48-79 lbs)6 to 11 years
