What 172.204(d) means in plain language
When you're transporting hazardous materials, your shipping papers must include an emergency response telephone number. This isn't optional. The regulation requires that anyone handling, loading, or receiving your shipment can contact an emergency responder immediately if something goes wrong.
The phone number must be immediately accessible on the shipping paper itself—not buried in a separate document, not just in your cab office, and not something you have to look up. If an inspector pulls your paperwork at the roadside and that emergency contact number isn't there, you're in violation of 172.204(d).
What our enforcement data actually shows
This violation is exceptionally rare in the field. Across our 13 million inspection records, 172.204(d) has generated only 4 all-time citations, with 0 citations in the last 12 months and 0 in the last 90 days. The code ranks #2480 out of 3,036 FMCSR codes by enforcement volume.
None of the 4 citations on record resulted in an out-of-service order—the OOS rate is 0.0%. For context, the all-FMCSR average OOS rate is 31.4%, so this violation almost never triggers vehicle removal. That said, rarity doesn't mean irrelevance. Hazmat enforcement is serious, and inspectors check shipping papers carefully.
Who gets cited most
Our inspection records show that enforcement of this code is so sparse that no single state or carrier dominates the citation pattern. The 4 all-time citations are distributed across different operators: Christensen Inc (USDOT 65033), Pilot Travel Centers LLC (USDOT 91805), IMG Trucking Inc (USDOT 1943083), and Interlogistics de Mexico S de RL de CV (USDOT 3932007) each had one citation. Vehicle makes cited include Kenworth (2 citations) and single citations for Heil, Freightliner, Polar Manufacturing, Stoughton, Wabash National, and Peterbilt units.
How severe is this compared to similar codes
Hazmat shipping-paper violations cluster together in the regulatory framework. For comparison, 172.602(c)(1)—Maintenance and accessibility of Emergency Response information—has seen 1,464 citations all-time with a 0.0% OOS rate, identical to 172.204(d)'s enforcement outcome. More aggressive placarding violations like 177.817(a) rack up 2,274 citations with a 75.1% OOS rate, and general loading/unloading hazmat violations (177.834A-HMC) have driven 3,954 citations with a 99.2% OOS rate. The takeaway: missing an emergency phone number is treated as a lower-severity documentation issue compared to physical placarding or loading-procedure violations.
How to avoid it
The fix is straightforward and requires zero field improvisation:
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Print or write the emergency response number directly on every shipping paper before the vehicle leaves the shipper's dock. Do not rely on a separate emergency contact sheet or your company's general phone line. The number must be visible on the paper itself.
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Use your company's designated hazmat emergency hotline if one is in place, or the shipper's emergency contact. Verify this number is current before each load—phone numbers change, and an outdated number is as useless as a missing one.
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Check your shipping papers during pre-trip inspection. Before accepting a load, scan the documentation for the emergency contact. If it's not there, flag it immediately and request corrected paperwork. Don't leave the dock with incomplete papers.
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Train on your company's hazmat documentation process. If you're hauling hazmat regularly, make sure you understand which shipper is responsible for the phone number and what your backup procedure is if documentation arrives incomplete.
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Document your pre-trip checklist to include a confirmation that hazmat shipping papers contain the emergency response number. A simple checkbox or note proves due diligence if questioned later.
The rarity of this citation suggests that most carriers and drivers already have this locked down. Your job is to stay in that majority by building it into routine practice, not an afterthought.