What 387.403(b) means in plain language
387.403(b) is a general administrative requirement under FMCSR Part 387. This code addresses compliance documentation and record-keeping obligations that carriers and drivers must maintain. The regulation requires you to have proper proof of your compliance status available during an inspection.
When an officer cites you for this violation, they're saying your documentation—whether it's proof of authority, licensing status, or required permits—was either missing, incomplete, or not presented when requested. This is a paperwork violation rather than a safety defect on the vehicle itself.
What our enforcement data actually shows
Across our 13 million inspection records, 387.403(b) is rarely cited. We've recorded 19 all-time citations for this code, with zero citations in the last 12 months and zero in the last 90 days. None of those 19 citations resulted in an out-of-service placement—giving this code a 0.0% OOS rate.
For context, the average FMCSR code carries a 31.4% out-of-service rate nationally. 387.403(b) sits at rank #1962 out of 3,036 FMCSR codes by citation volume, meaning it's among the least-cited violations in our database. The fact that you're reading this suggests you're in a very small group of drivers cited for this particular infraction.
Who gets cited most
Because citations for 387.403(b) are so infrequent, the enforcement pattern is scattered. Our data shows fleets such as J B Hunt Transport Inc and Schneider National Carriers Inc each with single citations over our entire record history. No state or carrier dominates the pattern—this violation appears sporadically across the industry rather than concentrated in specific regions or carrier fleets.
How severe is this compared to similar codes
Other general administrative codes in the same category show similar enforcement patterns. For example, 390.21(b) (USDOT number display requirements) has 13,244 citations with a 0.0% OOS rate, and 390.21(a) (vehicle marking requirements) has 25,872 citations, also at 0.0% OOS. These peer codes confirm that administrative violations rarely trigger immediate removal from service. By contrast, codes like 390.19B2-BIENNIAL have seen 16,142 citations with a 0.2% OOS rate—still low, but slightly more enforcement activity.
How to avoid it
Since 387.403(b) is documentation-focused, prevention is straightforward:
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Carry all required paperwork — Before every trip, confirm you have your FMCSA safety certificate, proof of insurance, carrier authority documents, and any applicable permits in an easily accessible location in the cab.
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Know what an officer will ask for — During a roadside inspection, officers routinely request proof of your carrier's DOT registration, your driver's license, and evidence of current medical certification. Have these readily available, not buried in a bag or forgotten at the terminal.
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Organize your documents — Use a folder or file system that keeps registration, insurance, and authority documents together so you can hand them over quickly and completely. Partial or incomplete submission of requested documents is what triggers this citation.
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Verify carrier compliance before dispatch — If you drive for a fleet, your dispatcher or safety manager should brief you on the company's current authority status and any special permits for your load. Don't assume; confirm.
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Update your medical card immediately — An expired medical certificate can affect your legal status to operate. Check your card's expiration date before every multi-day trip.