Ohio state law requires that children under four years old and under 40 pounds must ride in a car seat or booster that is appropriate for the child's age and weight. Ohio state law also states that the car seat must be used according to manufacturer's instructions.
Beginning October 7, 2009, Ohio also requires that children ages four through seven who are less than 4'9" tall must ride in a federally approved booster seat.
Children through age 15 must wear a seat belt or be secured in an appropriate child restraint system.