What 172.323 means in plain language
172.323 addresses requirements for hazardous materials shipping papers and documentation. Specifically, it covers the proper completion, retention, and availability of shipping papers that must accompany hazardous materials in transport. These papers must include specific information about the materials being transported, their hazard classification, and emergency response procedures.
As a driver, you are responsible for having these documents readily available during transport and at all times the vehicle is in your care. The papers must be legible, complete, and match the cargo actually loaded. If an inspector asks to see your shipping papers and they are missing, incomplete, or inaccurate, you can be cited under this code.
What our enforcement data actually shows
Across our 13 million inspection records, 172.323 has been cited only 2 times all-time, with 1 citation in the last 12 months and 0 citations in the last 90 days. This makes 172.323 ranked #2651 of 3,036 FMCSR codes by citation volume—one of the least frequently enforced regulations in the federal motor carrier safety rules.
The out-of-service rate for 172.323 is 0.0%, meaning none of the 2 all-time citations resulted in a vehicle being placed out of service. This is notably lower than the all-FMCSR average OOS rate of 31.4%, indicating that when this violation is found, inspectors typically issue a citation without removing the vehicle from service.
Who gets cited most
Our inspection records show that among the carriers cited for 172.323, C N TOMMELL LLC (USDOT 895342) and E & K SANDOVAL TRANSPORTATION LLC (USDOT 3904684) each had 1 citation all-time. Because the citation volume is so low, no clear state or carrier pattern emerges from the data.
How severe is this compared to similar codes
Hazardous materials violations in the same category show dramatically different enforcement frequencies and severity. General loading and unloading violations under 177.834A-HMC and 177.834(a) together account for 7,793 citations with OOS rates of 99.2% and 97.9% respectively—among the most serious violations in the entire FMCSR. Placarding violations under 177.817(a) have generated 2,274 citations with a 75.1% OOS rate.
By contrast, 172.323 has been cited only 2 times. Other shipping-paper-related codes show higher citation volumes: 172.502(a)(1) on general placarding requirements has 1,820 citations with an 18.5% OOS rate. The rarity of 172.323 citations suggests it is either well-understood by carriers or infrequently inspected relative to other hazmat documentation requirements.
How to avoid it
-
Verify shipping papers before departure. Check that all hazmat shipping papers are present in your cab, legible, and complete. They must match the cargo loaded and include hazard classification, emergency contact information, and proper documentation for each material.
-
Keep papers accessible and organized. Shipping papers must be immediately available for inspection. Do not store them in locked compartments or buried under other documents. Use a designated folder or clipboard so you can produce them within seconds at a weigh station.
-
Cross-check cargo against documentation. Before accepting a load, verify that the shipping papers describe the actual materials being transported. Mismatches between papers and cargo are a red flag for inspectors and can compound your violation.
-
Understand your load classification. If you transport hazmat, understand what class and hazard group your cargo falls into. Incorrect classification on shipping papers is a common documentation error.
-
Update papers for any stops or transfers. If you pick up or drop off part of a hazmat load, ensure that shipping papers are updated and reflect what you are currently carrying.
-
Review papers at rest stops. During meal breaks or layovers, take two minutes to confirm shipping papers are still in your cab and remain legible. Weather and handling can degrade documents over time.