What 172.302C means in plain language
FMCSR 172.302C requires that bulk packages containing hazardous materials must display the proper special permit number when one is required by the Department of Transportation. A special permit is an authorization from DOT that allows a shipper or carrier to transport hazardous materials under conditions that differ from the standard regulations—for example, in higher quantities, in different packaging, or via routes that wouldn't normally be approved.
When hazmat is transported in bulk and a special permit governs that shipment, that permit number must be clearly marked on the package itself. This marking serves as proof that DOT has reviewed and approved the specific transportation arrangement. An inspector checking your load will look for this number to verify that the shipment is operating under proper authorization.
If you're cited for this violation, it means an inspector found a bulk hazmat package in your load that either lacked the required special permit number entirely, or the number was missing, illegible, or incorrect. This is a documentation and marking issue, not a question of whether the hazmat is safe or properly loaded—it's about whether DOT's approval is visible on the container.
What our enforcement data actually shows
Across our 13 million+ inspection records, 172.302C is exceptionally rare. Our database shows only 1 citation for this violation in all-time history, with 0 citations in the last 12 months and 0 in the last 90 days. The citation resulted in 0 out-of-service actions—the driver was cited but not placed out of service.
This code ranks #2796 of 3,036 FMCSR codes by citation volume, putting it in the bottom 8% of enforcement frequency. The all-FMCSR average out-of-service rate is 31.4%; 172.302C carries a 0.0% OOS rate, meaning when it has been cited, inspectors have not deemed the vehicle or driver unsafe enough to remove from service. The extreme rarity and zero OOS rate suggest this violation is either caught very infrequently or resolved through documentation review rather than vehicle removal.
Who gets cited most
Our enforcement data shows only one citation on record for 172.302C. That citation was issued to a vehicle operated by Hobbs Rental LLC (USDOT 2053622). Because citation volume for this code is so minimal—just a single instance—state-by-state patterns and carrier trends are not statistically meaningful. This is not a widespread enforcement issue across the industry.
How severe is this compared to similar codes
Hazmat marking and placarding violations sit on a spectrum. Peer codes in the same hazmat category show vastly different enforcement intensity and severity outcomes.
General loading/unloading violations (codes 177.834A-HMC and 177.834(a)) dominate the category with 3,954 and 3,839 citations respectively, both carrying OOS rates above 97%—meaning nearly all instances result in the vehicle being removed from service. These are treated as serious safety violations.
Placarding violations (177.817(a)) have logged 2,274 citations with a 75.1% OOS rate, also resulting in frequent vehicle removals. Placard deterioration (177.817(e)) is cited 2,038 times but only triggers an OOS action 5.2% of the time, suggesting inspectors view worn placards as correctable marking issues rather than immediate hazards.
General placarding requirements (172.502(a)(1)) has 1,820 citations with an 18.5% OOS rate, and placard deterioration on bulk packages (172.516(c)(6)) has 1,796 citations with a 1.6% OOS rate. By comparison, 172.302C at 1 citation and 0.0% OOS rate is nearly invisible in enforcement. This suggests inspectors and carriers view special permit documentation as less likely to be missing than other marking defects, or that when found, it's typically corrected administratively rather than triggering roadside shutdown.
How to avoid it
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Know your hazmat manifest before departure. Review the bill of lading and shipping papers to confirm which loads require special DOT permits. If a permit is listed, note its number and ensure it appears on the packaging documentation you receive.
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Verify special permit numbers match the bulk package label. Before loading, cross-reference the permit number on the shipper's documentation with the number printed or affixed to the bulk container. Do not accept a package if the numbers don't match or if the permit number is missing.
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Check for legibility and placement. Special permit numbers must be clearly visible and in a standard location on the bulk package. If markings are faint, smudged, or partially obscured, request a corrected label from the shipper before you load.
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Request clear documentation from shippers and brokers. Make it a pre-load habit to ask the shipper or broker: "Is there a special permit for this load?" If yes, ask to see the permit number and confirm it matches the package label. This takes two minutes and prevents roadside citations.
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Keep manifests accessible during transport. Have your hazmat shipping papers organized and within reach during your trip. If an inspector questions a bulk package marking, you can quickly show the permit documentation and resolve any discrepancy on the spot.