Disqualification
A period during which a CDL holder is prohibited from operating a commercial motor vehicle due to a serious traffic violation, major offense, or other federal regulatory violation.
CDL disqualifications are defined in 49 CFR 383.51. They can range from temporary (60 days) to permanent, depending on the nature and number of violations.
Disqualifying offenses under 49 CFR 383.51
Major offenses resulting in CDL disqualification include: DUI/DWI in a CMV; leaving the scene of a CMV accident; using a CMV to commit a felony; causing a fatality through negligent CMV operation; operating a CMV with a revoked or disqualified CDL; and a first violation of an out-of-service order (60-day minimum for some). Most first-offense major violations result in at least a 1-year disqualification. Transporting hazardous materials while under the influence results in a 3-year minimum. Repeat violations lead to lifetime disqualification.
CDL holder notification requirements
CDL holders must notify their employer within 30 days of any conviction for a traffic violation in any vehicle — not just CMVs. They must also notify their state CDL licensing agency within 30 days of a conviction in any state other than their home state. Failure to notify is itself a separately disqualifying violation. Carriers who dispatch a knowingly disqualified driver face significant regulatory and liability consequences. Running MVRs at hire and annually catches violations that drivers may not self-report.
Last updated: June 4, 2026
When this definition matters
This term usually matters when a driver, owner-operator, or small carrier is deciding whether a federal rule applies, preparing a compliance file, or checking a state CDL step. Use this definition as a starting point, then confirm the controlling requirement in the official source listed below before making a licensing, hiring, dispatch, or recordkeeping decision.
The related terms above are included because they often appear in the same compliance workflow. Reviewing them together can prevent common mix-ups, such as treating a state licensing step as a federal carrier obligation or confusing a driver record with a separate employer record.