What 180.352(b) means in plain language
FMCSR 180.352(b) governs the marking of retest dates on rigid intermediate bulk containers (IBCs). When you transport hazardous materials in rigid IBCs, federal regulations require that these containers display proper documentation showing when they were last inspected and certified to be safe for continued use. The retest date marking serves as proof that the container has been tested within the required timeframe and is fit to carry hazmat cargo.
If an inspector finds that a rigid IBC you're hauling lacks the correct retest date marking, or the marking is missing, illegible, or outdated, you'll be cited for this violation. The inspector is checking that your load meets documentation and container certification standards before it ever leaves the dock—and they'll verify it again at roadside.
What our enforcement data actually shows
Across our 13 million+ inspection records, 180.352(b) has generated only 7 all-time citations. In the last 12 months, we've recorded 0 citations for this code, and 0 in the last 90 days. This makes 180.352(b) ranked #2312 out of 3,036 FMCSR codes by citation volume—one of the least-cited hazmat-related violations in the system.
Of the 7 citations ever recorded, none resulted in an out-of-service order. The code carries a 0.0% out-of-service rate. For context, the all-FMCSR average OOS rate is 31.4%, so 180.352(b) citations are typically handled as warnings or corrections rather than vehicle impounds. This reflects the nature of the violation: it's a documentation and marking issue that can usually be remedied without taking the truck off the road immediately.
Who gets cited most
Our inspection records show that Bosque Disposal Systems LLC (USDOT 2086894) has received 4 citations for 180.352(b)—the highest count in our database. Reynolds Aviation LLC (USDOT 473241), Rolfson Oil LLC (USDOT 922664), and Select Water Solutions LLC (USDOT 1609544) each have 1 citation. The small citation volume means no clear geographic or carrier-type pattern emerges from the data. The violation affects specialized carriers who handle rigid IBC hazmat shipments, but the overall frequency is extremely low.
How severe is this compared to similar codes
180.352(b) sits in the Hazardous Materials enforcement category. Related violations show vastly different enforcement intensity. For example, 177.834A-HMC (general loading/unloading hazmat) has accumulated 3,954 citations with a 99.2% out-of-service rate, and 177.834(a) (also general loading/unloading hazmat) has 3,839 citations at 97.9% OOS rate—these are far more serious and far more frequently cited.
Placarding violations follow a similar pattern of higher volume and severity. 177.817(a) (placarding violation) has 2,274 citations at a 75.1% OOS rate. By contrast, 172.602(c)(1) (maintenance/accessibility of Emergency Response information) carries 1,464 citations with a 0.0% OOS rate, matching 180.352(b)'s enforcement posture. The rarity and non-OOS nature of 180.352(b) suggests inspectors encounter well-marked containers most of the time.
How to avoid it
Your defense against a 180.352(b) citation begins before you accept a load:
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Pre-trip inspection for rigid IBCs: Before signing the bill of lading, visually inspect every rigid IBC on your truck. Look for a legible retest date marking on the container itself. If you cannot read it clearly, ask the shipper to point it out or to re-mark it. Do not accept containers with faded, worn, or missing date stamps.
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Know the retest interval: Rigid IBCs for hazmat must be retested at intervals set by the DOT and the container manufacturer. Most are tested annually or every 2.5 years depending on the material. Verify that the marked date is current. If the date has passed, refuse the load or ask the shipper to provide a container that has been recently inspected.
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Document container condition: Take a photo of the retest date marking on any rigid IBC before you leave the shipper's dock. This protects you if an inspector later claims the marking was absent—you'll have evidence it was present when you took possession.
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Check shipper paperwork: Request a shipping paper or manifest that lists the containers and their last retest dates. If the paperwork doesn't match what's marked on the container, raise the issue with the shipper before departure. Don't assume the container is compliant just because paperwork says so.
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Report non-compliant containers: If a shipper regularly sends you IBCs with poor or missing retest markings, document it and escalate to your fleet safety manager or dispatcher. Repeat offenders should be flagged to your compliance team.
Since 180.352(b) citations are rare and non-OOS, they typically result in a warning and a request to correct the marking before the next inspection. However, if you're hauling hazmat, every citation adds to your carrier's inspection history and can flag your fleet for more intensive scrutiny in future audits. Prevention through careful pre-trip inspection is far easier than managing citations after the fact.