REQUIREMENTS: You are required to appear for the DOT (Department of Transportation) physical exam, a drug test screening test, and you also must produce a valid drivers license issued in the state in which you live. However, the most important document or identification requirement for commercial driving is the CDL or the Commercial Drivers License. If this permit is not with you, you are not, by law, eligible to drive trucks of more than 26,000 pounds hauling capacity.