What 383.51A-SOUT means in plain language
When you receive a 383.51A-SOUT citation, it means you have been disqualified from operating a commercial motor vehicle. This is not a warning or a minor violation—it is a major offense that triggers immediate loss of driving privileges.
Disqualification under this code applies when a driver commits one of several serious infractions: operating under the influence of drugs or alcohol (DUI), leaving the scene of an accident, or committing a felony while in control of a commercial vehicle. Once issued, a 383.51A-SOUT citation removes your legal right to drive a CMV until the disqualification period ends or conditions are met for reinstatement.
Unlike many roadside citations, this one carries an automatic and nearly universal consequence: placement out of service at the roadside.
What our enforcement data actually shows
Across our 13 million+ inspection records, we have documented 1,114 all-time citations for 383.51A-SOUT. In the last 12 months, there were 969 citations, and in the most recent 90 days alone, 308 citations were issued. This code ranks #688 out of 3,036 FMCSR codes by total citation volume.
The out-of-service rate for 383.51A-SOUT is 99.6%—meaning 1,109 drivers out of 1,114 were placed out of service at roadside. This rate is dramatically higher than the all-FMCSR average OOS rate of 31.4%. In fact, disqualification citations are almost always followed by immediate removal from service, reflecting the severity of the violation.
The monthly trend over the past 12 months shows a significant spike beginning in mid-2025. Citations climbed from just 2 in April 2025 to a peak of 140 in December 2025, with 134 citations issued in March 2026. This upward trajectory suggests intensified enforcement focus on driver disqualification offenses.
Who gets cited most
Our inspection records show the highest concentration of 383.51A-SOUT citations in the last 180 days occurred in New York, with 116 citations and a 99.1% out-of-service rate. Oregon and South Carolina followed, each with notably high enforcement volume and 100% OOS rates—58 and 36 citations respectively. Texas recorded 38 citations with a 97.4% OOS rate.
The consistency of near-universal out-of-service placement across all top states reflects the non-discretionary nature of this offense. Whether you are cited in New York, Oregon, or Texas, the outcome is essentially the same: immediate removal from operation.
How severe is this compared to similar codes
Within the Driver Fitness category, 383.51A-SOUT stands among the most serious citations. For context, our data shows 383.23(a)(2)—operating a CDL in the wrong class—generated 50,385 citations with a 98.4% OOS rate. The related code 383.23A2-LCDLN, for operating a CMV without a valid CDL, accumulated 47,123 citations and a 98.6% OOS rate.
While those codes surpass 383.51A-SOUT in absolute citation volume, they often reflect documentation or licensing status issues that may be resolved more readily. In contrast, 383.51A-SOUT disqualifications stem from criminal conduct or major safety violations and typically require intervention by state licensing authorities or completion of mandatory waiting periods. The CSA severity weight assigned to this code is 10, underscoring its gravity.
How to avoid it
Before you start your shift:
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Verify your medical certificate and licensing status. Our data shows 391.41APC (operating without a valid medical certificate) co-occurs in 29 inspections with 383.51A-SOUT citations. Do not operate if your credentials are expired or suspended.
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Do not operate if you are impaired or fatigued. The co-occurrence data reveals 392.2-SLLIFTA (operating while ill or fatigued) appears in 30 shared inspections. This is both a direct safety hazard and a pathway to disqualification. If you feel unfit, report it.
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Ensure your pre-trip inspection is complete and documented. The code 396.17C-PI (no proof of periodic inspection) co-occurs in 38 shared inspections. Thorough vehicle checks catch mechanical failures before they create unsafe conditions.
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Maintain accurate records of duty status. Codes 395.8A1-HOSP and 395.8E-HOSPD (HOS violations and false records) appear together in 38 and 15 shared inspections respectively. Falsifying logs can escalate consequences and is itself a serious violation.
On the road:
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Never leave the scene of an accident. Leaving the scene is one of the three primary triggers for 383.51A-SOUT. Even a minor incident requires you to remain and cooperate with authorities.
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Do not drive under the influence of any substance. DUI is the most common basis for disqualification. This applies to alcohol, prescription drugs, and any controlled substance that impairs your ability to operate safely.
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Do not engage in criminal conduct while operating a CMV. Using your commercial vehicle to commit or facilitate a felony results in automatic disqualification.
The enforcement data makes clear: disqualification citations are treated with zero tolerance and nearly always result in immediate out-of-service placement. Prevention rests entirely on your decision-making before and during operation.