FMCSR 172.406F: Obscured Hazmat Label — Q&A

No. Across our 13 million inspection records, 172.406F has never resulted in an out-of-service citation—a 0% OOS rate all-time. None of the 7 citations on record led to vehicle placement out of service. This is significantly lower than the all-FMCSR average of 31.4%, which means inspectors treat label obscuration violations as fixable compliance issues rather than safety-critical stops.

First, do not move the vehicle with obscured hazmat labels if the shipment is still on board. Check immediately: is the hazardous materials label (shipping paper, placard, or marking) blocked by cargo, straps, dirt, or damage? Document what you see with photos. Contact your dispatcher and the shipper to clarify what cargo is aboard and which labels apply. Correct the obscuration before the next move. If inspected again, you'll want evidence that the label is now fully visible and legible.

It's among the least serious hazmat violations in our database. Similar placard violations like 177.817(a) (placarding violation) carry a 75.1% OOS rate, while 172.516(c)(6) (placard damaged, deteriorated, or obscured) has a 1.6% OOS rate. Your citation at 0% OOS sits in the most lenient tier. For context, general hazmat loading violations (177.834A-HMC) result in out-of-service 99.2% of the time. Label obscuration is treated as a documentation/visibility issue, not a handling emergency.

No. In the last 90 days, there have been zero citations for 172.406F in our database of 13 million inspections. In the last 12 months, only 3 citations appeared nationally. All-time, just 7 citations exist on record. This code ranks #2312 out of 3,036 FMCSR codes by citation volume, making it extremely uncommon. It's not a high-enforcement priority for FMCSA.

Texas is the only state with a recorded 172.406F citation in the last 180 days (1 citation, 0 OOS). The extremely low national volume—3 citations in 12 months—means this violation is so rare that meaningful state-by-state comparisons aren't practical. Geographic enforcement appears sporadic rather than coordinated.

Yes, DataQs (FMCSA's roadside data quality and dispute resolution system) allows drivers and carriers to contest inspection findings. For a 172.406F citation, you would need to demonstrate that the label was actually visible and legible at the time of inspection. Gather photos showing the label clearly marked, shipping papers, and any evidence that the label became obscured only after the inspection. DataQs requires specific, documented evidence that the citation was factually incorrect.

Hazmat violations affect both the driver and the carrier in FMCSA's Compliance, Safety, and Accountability (CSA) system. The citation will appear in your safety record and your carrier's record. If you're a company driver, the violation contributes to your Motor Carrier Safety Management BASICs. If you're owner-operator, it affects your individual BASIC scores. Either way, a single citation at 0% OOS rate has minimal impact compared to repeat or high-OOS violations.

Our inspection database does not track specific CSA point values—those are assigned by FMCSA's CSA algorithm based on violation severity and inspection type. FMCSR 172.406F, given its 0% OOS rate and rarity (7 all-time citations), is likely weighted as a minor violation. Consult your carrier's CSA coordinator or FMCSA's website for the exact points. A single obscured-label citation will have far less impact than repeated or critical hazmat handling violations.