What 387.31(a) means in plain language
387.31(a) addresses administrative and record-keeping requirements related to driver qualifications and documentation. The regulation requires carriers to maintain accurate records and files that demonstrate compliance with driver qualification standards. When an inspector cites this code, they've found a gap in your carrier's record-keeping or documentation process—not necessarily a defect on your truck or a violation of your driving behavior.
This is fundamentally different from mechanical or safety violations. You may have been operating your vehicle perfectly and following all driving rules, but the citation arose because of how your employer maintains its administrative systems or files. That said, a citation on your record affects your carrier's safety profile, so understanding what triggered it matters for both you and your fleet.
What our enforcement data actually shows
Across 13 million inspections in our database, 387.31(a) is one of the least-cited regulations: only 22 citations on record all-time. In the last 12 months, we recorded zero citations for this code, and zero in the last 90 days. None of those 22 all-time citations resulted in an out-of-service placement—the OOS rate is 0.0%.
For context, the all-FMCSR average out-of-service rate is 31.4%. This code ranks #1898 out of 3,036 FMCSR regulations by citation volume, meaning it's genuinely rare. If you received this citation, you're in uncommon company. The rarity itself suggests inspectors apply it conservatively and only when documentation gaps are clear.
The zero OOS rate also tells you something important: the Federal Motor Carrier Safety Administration does not treat this violation as an immediate safety threat warranting removal of a vehicle or driver from service. It's a compliance notice, not an emergency stop.
Who gets cited most
Because citation volume is so low (22 all-time), carrier and geographic patterns are limited. Our data shows fleets such as Classic Elegance Coaches LLC (USDOT 2516053) and DriverGent Inc (USDOT 3315013) each appeared twice in our records for this code. No single state dominates the citation pattern enough to draw reliable conclusions about regional enforcement trends.
The rarity of citations across all carriers and states suggests that inspectors and enforcement agencies view this code as a low-priority citation area, applied only when documentation deficiencies are unmistakable.
How severe is this compared to similar codes
This code belongs to the General/Admin category alongside vehicle marking and registration requirements. Peer codes in the same category show dramatically higher citation volumes: 390.21TB2-DOT has logged 74,663 citations (0.0% OOS rate), 390.21T(b) has 61,097 citations (0.0% OOS rate), and 390.21(a) has 25,872 citations (0.0% OOS rate).
Despite the lower citation volume, 387.31(a) shares the 0.0% out-of-service rate with most of these peer codes. This reinforces that administrative and documentation violations in this category are not treated as immediate safety emergencies. Your citation is serious for compliance record purposes, but it does not carry the severity of mechanical or driver-conduct violations.
How to avoid it
Since 387.31(a) concerns driver qualification records and documentation, prevention is primarily a carrier responsibility. However, you can support compliance:
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Work with your safety or HR department to verify your file is complete before each inspection season. Request a copy of your driver qualification file and confirm it includes your Medical Certificate, proper licensing documents, and any required training records. Gaps here directly feed inspector findings.
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Report any discrepancies in your employment records immediately. If you know your carrier is missing documents (training completion forms, medical certifications, background checks), flag it to your safety manager or HR before an inspection catches it.
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Maintain your own copy of required credentials. Keep photocopies of your valid CDL, current Medical Certificate, Hazmat endorsement (if applicable), and training completion documentation in your truck. You cannot control how your carrier files records, but you can verify what you've provided.
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Ensure Medical Certificate renewal happens on schedule. This is one of the most common file gaps. Notify your carrier 30–60 days before expiration so they can update your qualification file without delay.
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Ask your carrier for clarification on what goes in a complete driver file. Ignorance of what should be there is not a defense, but it prevents accidental omissions on your end.