You are a commercial vehicle driver if you: • Operate a single vehicle with a gross vehicle weight rating (GVWR) of 26,001 pounds or more. • Operate a combination of vehicles with a gross combination weight rating (GCWR) of 26,001 pounds or more if the vehicle(s) being towed has a GVWR of more than 10,000 pounds. • Operate a vehicle that carries 16 or more passengers, including the driver. • Operate any size vehicle that transports hazardous materials and that requires federal placarding.”