What 172.514(b) means in plain language
This regulation requires that bulk packages containing residue from hazardous materials must display proper placards. When a bulk container has been used to transport hazardous material and still retains residue from that material, federal law demands that the package remain placarded until it is cleaned or properly certified as empty.
The intent is straightforward: residue can pose the same hazard as the original material. A tanker that carried flammable liquid, even with most of its contents removed, still carries vapor or liquid residue that could ignite or react. Inspectors check that your bulk packages carry the correct placard matching whatever hazardous residue remains inside.
If you transport bulk containers—whether in a dedicated tanker, a portable tank, or a cargo tank—and those containers hold any residue from a hazardous material, placarding is not optional. This applies whether you are the shipper, carrier, or driver.
What our enforcement data actually shows
Across our 13 million+ inspection records, 172.514(b) is a rare citation. Our database shows 39 all-time citations for this code, with 0 citations in the last 12 months and 0 in the last 90 days. This places it at rank #1701 out of 3,036 FMCSR codes by citation volume.
When inspectors do cite this violation, the outcome is notably severe. Out of 39 citations on record, 19 resulted in an out-of-service order—a 48.7% OOS rate. That is substantially higher than the all-FMCSR average of 31.4%, signaling that inspectors treat improper bulk-package placarding as a serious safety issue. Nearly half of drivers cited for this code had their vehicle immediately removed from service.
The recent enforcement silence (zero citations in 90 days) does not mean compliance is perfect; it may reflect that fewer drivers are transporting bulk hazmat residue, or that most who do are compliant. Regardless, when this violation does appear, it triggers enforcement action at a rate well above the median.
Who gets cited most
Our inspection records do not include geographic breakouts for this specific code, so we cannot identify top states. However, our data shows carriers such as Enrique Vega Cobos (USDOT 3894740) and Doyle Farms Inc (USDOT 1396268) with 2 citations each on record. Multiple carriers—including World Fuel Services Inc, Herc Rentals Inc, Toro Oil Haulers LLC, Francisco Partida Zepeda, and Bosque Disposal Systems LLC—each appear with 2 citations. This distribution suggests the violation occurs across a range of fleet sizes and commodity types, rather than concentrating in one carrier segment.
Vehicle makes cited include freight trailers (6 citations recorded as "OTHR"), Freightliners (3 citations), and Kenworths (3 citations), reflecting the prevalence of these units in bulk transport operations.
How severe is this compared to similar codes
Placarding violations are a broad category within hazardous materials enforcement. Our data reveals significant variation in severity:
177.817(a) — Placarding violation (general) — carries 2,274 all-time citations and a 75.1% OOS rate, reflecting more frequent enforcement and higher out-of-service outcomes.
172.502(a)(1) — Placarding general requirements — shows 1,820 citations with an 18.5% OOS rate, far lower than 172.514(b)'s 48.7%.
177.817(e) — Placard deteriorated or damaged — has 2,038 citations but only a 5.2% OOS rate, suggesting inspectors treat damaged placards more leniently than missing or incorrect ones.
By contrast, the most severe hazmat codes in our database—such as 177.834A-HMC (general loading/unloading, 3,954 citations, 99.2% OOS rate)—nearly guarantee out-of-service placement. While 172.514(b) is less frequently cited, its 48.7% OOS rate places it in the upper half of enforcement severity, closer to codes addressing active hazmat movement than to codes addressing placard condition alone.
How to avoid it
Preventing a 172.514(b) citation requires diligence before and during every trip:
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Inspect your bulk package before loading. Confirm that the container is clean and free of residue, or that it is properly placarded for any residue it contains. Do not assume a "clean" appearance; residue can be invisible (powder, vapor, or liquid film).
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Verify the placard matches the residue. If the container held a flammable liquid, it must display a flammable-liquid placard even if mostly emptied. If it held a corrosive, poison, or oxidizer, the placard must reflect that. Cross-check the material safety data sheet (MSDS) for the original commodity.
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Check placard visibility and condition. Ensure the placard is firmly attached, legible, and not obscured by dirt, damage, or improper placement. A damaged or hidden placard will trigger a citation just as readily as a missing one.
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Document residue status. If you are transporting a container with declared residue, keep shipping papers that identify the residue and confirm proper placarding. If the container has been cleaned and certified empty, carry that certification and ensure no placard remains (a placard on an empty container is also a violation).
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Know your vehicle type. Tankers, portable tanks, and cargo tanks are the primary targets for this inspection. If you operate any of these, make bulk-package placarding a formal part of your pre-trip inspection checklist, not an afterthought.
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When in doubt, ask the shipper. Before you accept a bulk package, confirm its contents history and current residue status directly with the shipper or the packaging facility. A five-minute conversation can prevent a citation and a vehicle out-of-service order.
The rarity of this citation in recent months suggests that most bulk-transport operators are compliant. However, the 48.7% OOS rate when violations are found underscores that inspectors take this seriously. A single lapse in placard verification can result in immediate removal from service, cost, and delay. Consistency in pre-trip checking is your best defense.