Final answer:
Shipping papers that describe hazardous materials must be kept with the driver or carrier in a designated location for easy accessibility.
Step-by-step explanation:
According to United States Department of Transportation hazardous materials regulations, as well as EPA's hazardous waste regulations, shipping papers that describe hazardous materials must be kept in a specific location. These papers should be kept with the driver or carrier in a designated location, such as in a pouch on the driver's door or in a specific compartment in the vehicle. This ensures that the papers are easily accessible in case of an emergency or inspection.