What must you always have on your person when operating a commercial vehicle?

Answer: B — Your commercial driver's license (CDL)

When operating a commercial vehicle, it is essential to have your commercial driver's license (CDL) with you. A CDL permits you to drive specific classes of vehicles and ensures that you have met the necessary training and testing requirements to handle the complexities and responsibilities of driving larger, heavier, or more complex vehicles. Having your CDL on your person shows that you have the proper credentials and knowledge to operate a commercial vehicle safely and legally. It's a crucial requirement set by both state and federal regulations aimed at promoting road safety and accountability among commercial drivers. While personal driver’s licenses, vehicle registration, and insurance documentation are all important documents, they do not replace the need for a CDL when driving a commercial vehicle. Only the CDL verifies that you are qualified to drive that class of vehicle, which is why it is the most critical document to carry when operating commercially.