See also:

Hitches
Do not use a hitch that clamps onto the vehicle’s bumper or attaches to the axle. You must distribute the load in your trailer so that 10–15% of the total weight of the trailer is on the tongue. ...

The importance of shoulder belts
Using a booster without a shoulder belt increases the risk of a child’s head hitting a hard surface in a collision. For this reason, you should never use a booster seat with a lap belt only. It is ...

Reporting safety defects (U.S. only)
If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTS ...