What is it is against the law for a child under what age to ride in the open bed of a truck or trailer?

It is against the law for a child under 18 years of age to ride in the open bed of a truck or trailer in many states in the United States. This law is in place to prevent injuries or fatalities that can occur from accidents, sudden stops, or rough driving conditions while children are riding in the open bed. Children under 18 are considered to be at a higher risk of injury due to their size and vulnerability. It is important for parents and caregivers to ensure that children are properly seated inside the vehicle and wearing seat belts or restraints for their safety. Penalties for violating this law can include fines, points on the driver's license, and even jail time in some cases.