When should children start wearing a seat belt?

• When they turn eight years old
• When they weigh up to 36 kilograms and are up to 145 centimeters (4 ft 9 in) tall
• When they are able to wear a seat belt properly
• All of above
  Explanation:

  "Children should start wearing a seatbelt when they meet any of the following conditions: (1) when they are able to wear a seatbelt properly, (2) when they turn 8 years old, or (3) when they weigh up to 36 kg and are up to 145 centimeters (4 ft 9 in) tall."