Violation code

383.51A-NSIN

Driving a CMV while CDL is suspended for a non-safety-related reason and in the state of driver's license issuance.

Driver Fitness5Non-OOS· SMS Appendix A v3.20

383.51A-NSIN is a License-related: Medium violation under 49 CFR §383.51A-NSIN. It falls in the Driver Fitness BASIC with a severity weight of 5/10. Nationally it was cited 6,338 times in the last five years, with an OOS rate of 45.9%.

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National roadside inspection stats

as of 6/20/2026

Inspections

6,329

that found this code

Violations

6,338

total written

OOS rate

45.9%

2,911 OOS

Source: FMCSA roadside inspection data (last 5 years). The OOS rate is the share of these violations that led the officer to mark the driver or vehicle out of service.

Violation group: License-related: Medium
Regulation §: 383.51A-NSIN
Severity weight: 5
Used in SMS: Yes
Status: Active
Updated: 6/20/2026

Last updated June 2026

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Notes

DSMS: Y

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Challenging 383.51A-NSIN through FMCSA DataQs

If this violation was written incorrectly, here are the angles trucking-safety managers use to contest it. Playbook: Driver Fitness.

Common ways to challenge this code

Medical certificate was valid and on file
A valid medical examiner's certificate was in the driver's qualification file and was either not produced at roadside or not properly recognized.
Evidence that wins
- ✓Copy of the valid medical examiner's certificate
- ✓Driver qualification file index
- ✓National Registry verification printout
CDL class / endorsement was correct for the operation
The driver's CDL class and endorsements were correct for the vehicle and cargo being operated.
Evidence that wins
- ✓Copy of the valid CDL with endorsements
- ✓Vehicle registration showing GVWR/configuration
- ✓Bill of lading or shipping papers showing cargo

Common pitfalls — avoid these

⚠A medical certificate that expired the DAY of inspection still fails — there is no grace period

⚡ Draft a challenge for 383.51A-NSIN →Read the DataQs guide first

More codes in Driver Fitness

Same BASIC category — ranked by national citation volume

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Other License-related: Medium codes

Codes under the same FMCSA violation group

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Frequently asked questions about 383.51A-NSIN

What does violation 383.51A-NSIN mean?

383.51A-NSIN is the FMCSA roadside-inspection violation code for "Driving a CMV while CDL is suspended for a non-safety-related reason and in the state of driver's license issuance.", part of the License-related: Medium group, cited under 49 CFR §383.51A-NSIN.

What BASIC does 383.51A-NSIN affect?

383.51A-NSIN falls under the Driver Fitness BASIC in the FMCSA Safety Measurement System (SMS).

What is the CSA severity weight of 383.51A-NSIN?

383.51A-NSIN carries a severity weight of 5 out of 10. Higher weights indicate violations more closely tied to crash risk, and they count more toward a carrier's Driver Fitness score.

Is 383.51A-NSIN an out-of-service (OOS) violation?

No. 383.51A-NSIN is not an out-of-service violation, so on its own it does not trigger an out-of-service order at the roadside.

How many CSA points does 383.51A-NSIN add to a carrier's score?

The point contribution of 383.51A-NSIN depends on its severity weight (5/10) multiplied by a time weight of 3, 2, or 1 based on how recent the inspection is. You can calculate the exact contribution with the CSA points calculator.

Can 383.51A-NSIN be challenged through DataQs?

Yes. If you believe 383.51A-NSIN was recorded in error, you can file a Request for Data Review (RDR) through the FMCSA DataQs system with supporting evidence. A successful challenge can remove or correct the violation on your record.

Keep going

CSA points calculator How to challenge a violation Draft a DataQs letter for 383.51A-NSIN Driver Fitness BASIC Carrier CSA lookup CSA glossary