The federally defined list of offences that take away a commercial driver's licence - including offences committed in a personal car, and a lower alcohol limit than applies to other drivers.
A commercial driver's licence is issued by a state but governed by federal standards, and the federal rules define a set of offences for which the licence must be disqualified for a minimum period. The list includes driving a commercial vehicle with a blood-alcohol level at half the limit that applies to ordinary drivers, refusing a chemical test, leaving the scene of an accident, using a vehicle to commit a felony, and driving a commercial vehicle while the CDL is suspended. A second major offence disqualifies for life, with limited possibility of reinstatement.
What makes the rules unlike ordinary traffic law is that most of the major offences count when committed in any vehicle, including the driver's own car off duty. A conviction for impaired driving in a personal vehicle disqualifies the commercial licence even if the state court imposed no suspension on the ordinary one. A separate schedule of "serious traffic violations" - excessive speeding, reckless driving, improper lane changes, texting or hand-held phone use while driving a commercial vehicle - disqualifies after a second or third conviction within a set period.
Two further federal rules close the usual exits. A state may not "mask" a CDL holder's conviction by diverting it, deferring it, or allowing a plea that keeps it off the record, and the driver must notify their employer and their licensing state of any traffic conviction, in any vehicle, within a short period. Employers are required to check the record before hiring and annually, and a federal clearinghouse now records drug and alcohol testing violations separately from the driving record.
A commercial driver facing any moving violation - in any vehicle - should ask a lawyer what it does to the CDL before resolving it, because the federal disqualification follows from the conviction itself and no state court can plead around it. The advice is often not about the ticket but about which charge to fight for, since a reduction to a non-listed offence is the only outcome that protects the licence.
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