ID RequirementsValid state-issued identification required. Must have a valid non-CDL driver's license to apply for a CDL learner's permit. DOT medical certificate (DOT physical) required for CDL issuance.
RenewalRequired -- CDL valid for 4–8 years depending on state. Renewal requires current DOT medical certificate. HazMat endorsement must be renewed every 5 years (TSA STA also renewed). Contact your state DMV for state-specific renewal requirements.
Retake PolicyTypical 14-day waiting period between failed attempts; exact policy varies by state. Some states impose additional fees for each retake attempt.