Florida Statute §316.613 is the Florida Child Safety Seat Law and it has very specific requirements regarding the proper use of child restraints and seat-belts.
Florida law requires that all kids under 5 years of age be restrained no matter where they are seated in a car or truck. For children under 3 years of age, they must be secured in a child safety seat or in the car or truck manufacturer's integrated child safety seat. Volvo makes an excellent integrated car seat in it SUV models.
For children ages 4 - 5, they may travel in a vehicle if seated in a separate child carrier, or an integrated child-safety seat. If, however, the seat belt does not fit the safety seat correctly, a booster seat must be used. We recommend that children weighing approximately 40-80 pounds and under 4'9" tall should also ride in a booster seat.
Infants must always ride facing to the rear until they are at least one year old and weigh more than 20 pounds. It is important that when placing a child in a rear-facing car-seat, the infant be in a semi-upright at an angle of no more than 45 degrees. All forward-facing car seats should but a child sitting in an upright position.