What 383.51A means in plain language
383.51A is a CDL disqualification citation, issued when a driver has committed a major offense that makes them ineligible to operate a commercial motor vehicle. These major offenses include serious violations such as driving under the influence, leaving the scene of an accident, or committing a felony involving a CMV.
Once cited for 383.51A, you are disqualified from operating any commercial vehicle. This is not a warning or a correctable violation—it is an enforcement action that removes your right to drive a CMV until you complete the required reinstatement process set by your state's licensing authority. The severity weight of 10 reflects how serious the FMCSA treats this violation.
What our enforcement data actually shows
Across our 13 million inspection records, 383.51A is extremely rare but has the highest enforcement consequence: a 100.0% out-of-service rate. Every single citation in our database resulted in the driver being placed out of service immediately. This is dramatically higher than the all-FMCSR average OOS rate of 31.4%.
Since tracking began, we have recorded 6 all-time citations for this code. In the last 12 months, there was 1 citation, and in the last 90 days, there were 0 citations. This low volume reflects the severity of the violation—it only occurs when a driver has committed one of the most serious offenses defined in federal motor carrier safety regulations.
Who gets cited most
Our inspection records do not provide state-level breakdowns for this code due to its rarity. However, we can note that the 6 all-time citations came from diverse carriers. Our data shows fleets such as Ryder Truck Rental Inc (USDOT 16130) and Huey D Malmay Trucking (USDOT 658297) each had 1 citation on record. The vehicle makes involved in these citations included Freightliner (4 citations), with the remaining citations distributed across Daimler, Hyundai, Mack, and other makes.
How severe is this compared to similar codes
383.51A ranks #2357 out of 3,036 FMCSR codes by citation volume, reflecting its rarity. However, comparing it to other CDL-related fitness codes shows where it stands:
383.23(a)(2) (Operating with wrong CDL class) has 50,385 all-time citations with a 98.4% OOS rate. This code addresses licensing errors and is far more common.
383.23A2-LCDLN (Operating a CMV without a valid CDL) has 47,123 citations with a 98.6% OOS rate. Like 383.51A, this also results in near-certain out-of-service placement, but occurs much more frequently because it captures licensing lapses rather than major offenses.
391.41(a) (Physical qualification, general) has 42,270 citations but only a 16.2% OOS rate, showing that medical disqualifications are enforced differently than criminal or major-offense-based disqualifications.
The near-universal out-of-service rate for 383.51A underscores that once a major offense is documented, enforcement is immediate and absolute.
How to avoid it
Avoiding a 383.51A citation means avoiding the major offenses that trigger disqualification:
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Never drive under the influence. A DUI or DWI conviction while operating a commercial vehicle is grounds for immediate disqualification. Do not operate your CMV if you have consumed alcohol, drugs, or any substance that impairs your ability to drive safely.
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Stop at all accident scenes. Leaving the scene of an accident is a felony in most jurisdictions and an automatic disqualifying offense. Always remain at the scene, cooperate with law enforcement, and report the accident to your dispatcher and insurance carrier.
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Understand what constitutes a felony involving a CMV. Crimes such as using a CMV to commit fraud, trafficking controlled substances, or transporting hazardous materials illegally can trigger disqualification. Know your state and federal laws, and never use your commercial vehicle for illegal purposes.
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Maintain your judgment on the road. Many disqualifying offenses stem from poor decision-making during high-stress situations. Stay calm during traffic incidents, follow traffic laws consistently, and prioritize safety over schedule pressure.
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Know your carrier's safety and conduct policies. Your employer may have stricter rules than federal minimums. Review your handbook and understand the consequences of violations before you begin operating.
If you have been cited for 383.51A, your driving privileges are suspended. Contact your state's driver licensing agency immediately to learn the reinstatement requirements, which vary by state and offense type. You may need to complete rehabilitation programs, retraining, or other conditions before you can legally operate a CMV again.