How should an infant or a child who is either or both under the age 4 and weighing less than 40 pounds 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.
  Explanation:

  "Infants and children who are either or both under age 4 and weighing less than 40 pounds must be properly restrained in a child safety seat while being transported in a motor vehicle."
• They should be allowed to move freely in the vehicle without any restraint.