What 172.202A2 means in plain language
When you haul hazardous materials, your shipping papers must contain specific information about what you're carrying. A 172.202A2 citation means the inspector found that your hazmat description was incomplete—it was missing one or more of the required elements: the proper shipping name, hazard class, UN/NA identification number, or packing group.
This isn't about a misspelled word or sloppy handwriting. It's about missing a critical data point that responders need if something goes wrong. If your shipping paper says "corrosive liquid" but doesn't list the UN ID number, that's incomplete. If the hazard class is blank, that's incomplete. The shipper, carrier, and driver all share responsibility for accuracy, but at roadside, you're the one held accountable.
The violation applies whether your papers are on paper or electronic. The information must be there, legible, and correct before you move the vehicle.
What our enforcement data actually shows
Across 13 million inspections in our database, we recorded 294 all-time citations for incomplete hazmat shipping paper descriptions. In the last 12 months, that's 151 citations; in the last 90 days, 34 citations. This code ranks #1097 of 3,036 FMCSR codes by citation volume, meaning it's uncommon relative to the full spectrum of violations.
The out-of-service rate for 172.202A2 is 2.0%—meaning 6 vehicles were placed out of service across all 294 inspections, while 288 were not. This is significantly lower than the all-FMCSR average OOS rate of 31.4%. That said, an incomplete shipping paper is a compliance failure; the low OOS rate does not mean it's minor. It means inspectors often issue a citation and allow the driver to correct the document or proceed after resolution, rather than immediately removing the vehicle from service.
Who gets cited most
Our inspection records show Texas leads by far, with 72 citations over the last 180 days and a 1.4% OOS rate. New Mexico recorded 3 citations with a 0.0% OOS rate in the same period. The data indicates shipping paper documentation issues concentrate in border and Southwest corridors where hazmat movement is highest.
Among carriers in our database, IMPETUS LLC (USDOT 3058664) shows 23 all-time citations for this violation—the highest on record. This reflects the scale and volume of their hazmat operations, not necessarily fleet-wide compliance failure. AKNA TRANSPORTES S DE RL DE CV (USDOT 1856796) follows with 9 citations.
How severe is this compared to similar codes
Hazmat shipping paper and placarding violations span a wide severity range. Our data shows the difference clearly:
General loading/unloading violations (177.834A-HMC and 177.834(a)) dwarf 172.202A2 in both volume and OOS outcome: 3,954 and 3,839 citations respectively, with OOS rates of 99.2% and 97.9%. When hazmat is loaded or unloaded improperly, vehicles come off the road.
Placarding violations (177.817(a)) recorded 2,274 citations with a 75.1% OOS rate—much more severe than incomplete documentation. However, placard deterioration (177.817(e)) sits at 2,038 citations with only a 5.2% OOS rate, similar to 172.202A2's profile.
Incomplete shipping paper format (172.201D) appeared in our last 90 days of data as a co-occurring violation, suggesting the two errors often travel together and reflect a single root cause—insufficient pre-trip verification of the shipping documents themselves.
How to avoid it
Incomplete hazmat shipping papers don't happen by accident. They happen when you or the shipper skip verification steps. Here's what works:
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Before you accept the load, read the entire shipping paper aloud. Match it against the placards on your trailer. Confirm you see: proper shipping name, hazard class or division, UN/NA ID number, and packing group. If any field is blank or illegible, do not move the vehicle. Contact the shipper and get it corrected in writing.
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Know your vehicle. Freightliners (FRHT) account for 91 of our 172.202A2 citations—the highest make in our data. Volvo, Peterbilt, and Kenworth drivers also see this violation regularly. This pattern suggests no single truck type is immune; the violation stems from process, not equipment. Build your pre-trip checklist around the shipment, not the rig.
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Watch for co-occurring issues. Over the last 90 days, incomplete shipping paper descriptions commonly appeared alongside inoperable lights (393.9, 5 shared inspections) and brake problems (393.45DLUV, 3 shared inspections). An inspector stopping you for a lighting defect will scrutinize your hazmat papers closely. Don't let a secondary violation expose a primary one.
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Use a documented checklist. The data shows 172.202A4 and 172.202B (other incomplete description codes) co-occur with 172.202A2 in the same inspection, meaning a driver cited for one incompleteness is at high risk for another. A systematic review prevents this.
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Request corrected papers from the shipper, in writing. If you discover an error after pickup, stop immediately and contact dispatch. Do not proceed with incomplete documentation. A delay now beats a citation and CSA severity weight of 5 later.
The 2.0% OOS rate and 151 citations in the last 12 months tell you this violation is usually recoverable—but recovery takes time and requires you to catch it before roadside inspection.