All front seat occupants must be properly buckled up regardless of age (secondary enforcement).
All occupants younger than 18 must be properly restrained regardless of their location in a vehicle (primary enforcement).
Children under 7 years of age must be in an approved safety restraint; however, children under 7 years of age who are at least 57 inches tall (4' 9") and weigh 80 pounds or more may use a seat belt.
A child weighing more than forty pounds may use only a lap belt if the vehicle is not equipped with lap and shoulder belts or if all lap and shoulder belts are in use by other occupants. (This is because booster seats require both a lap and shoulder belt.)
Children ages 7 to 17 must be properly secured in a seat belt or child restraint.