Once a child under 8 years old gets taller than 57 inches, they must ride in:

• A federally approved forward-facing child passenger restraint system equipped with a five-point harness in the rear seat
• A federally approved rear-facing child passenger restraint system equipped with a five-point harness in the rear seat
• A federally approved booster seat in the rear seat of the motor vehicle
  Explanation:

  "Once a child under 8 years of age outgrow the top height or weight recommendations made by the child passenger restraint system manufacturer, children must ride in a federally approved booster seat (in a rear seat of the motor vehicle)."
• None of the above