How should a child under the age 4 be restrained in a vehicle?

• They should be seated on the lap of an adult.
• They should be secured with a regular seat belt without a child safety seat.
• They should be restrained in a federally approved child safety seat attached to the vehicle by a safety belt.
  Explanation:

  "A child under the age of four (4) must be restrained in a federally approved child safety seat (examples include infant only, convertible, combination, all-in-one car seat) that is attached to a vehicle by a safety belt or universal anchorage (LATCH) system."
• They should be allowed to move freely in the vehicle without any restraint.