What happens if you're cited for 172.406(e)? Direct answers on out-of-service risk, severity, and next steps based on 13M+ inspection records.
Ranks #2,811 of 3,146 FMCSR codes by citation frequency • OOS rate of 0.0% is below the FMCSR-wide average of 33.3%.
Failed to display duplicate label as required
Direct answers grounded in TruckCodex inspection data
No. Across our inspection records, this violation has a 0.0% out-of-service rate—meaning in every case where 172.406(e) was cited, the truck remained in service. This stands well below the 31.4% national average OOS rate across all FMCSR codes. However, the violation itself is rare: only 1 citation exists in our 13 million+ record database, and none have occurred in the last 12 months.
This is among the least-cited hazmat violations. While peer codes in the same category—like general loading/unloading hazmat violations (177.834A-HMC) or placarding violations (177.817(a))—rack up thousands of citations with OOS rates of 75–99%, 172.406(e) has generated only 1 citation ever. Its 0.0% OOS rate contrasts sharply with the 31.4% national average, suggesting enforcement is minimal and consequences are lighter than comparable hazmat rules.
Immediate steps:
Given the rarity of this citation, your focus should be on correcting the specific labeling issue identified.
Duplicate label violations are documentation and display issues, not equipment defects, which can make them contestable if you have photographic or written evidence the label was properly displayed at the time of inspection. DataQs allows you to challenge citations by submitting supporting documentation—photos, load manifests, or inspection photos—to demonstrate compliance. Success depends on your evidence quality. Because this violation is so rarely cited (1 case ever), request your inspection report immediately and consult with a compliance specialist or attorney familiar with hazmat documentation challenges.
Our database records only 1 citation for 172.406(e) across all jurisdictions and carriers. This citation was issued to NOVA MUD INC (USDOT 451545). Because the violation is so infrequently enforced—no citations in the last 12 months and none in the last 90 days—we cannot identify a state pattern. Hazmat violations overall are concentrated in high-traffic commercial corridors, but this specific code does not appear in enforcement records with measurable frequency.
Fix it promptly, but recognize this is not an emergency-level violation. The 0.0% out-of-service rate means inspectors are not pulling trucks off the road for this citation. However, hazmat labeling rules exist for safety and regulatory compliance. Correct the duplicate label placement on your next available opportunity—whether that means repositioning an existing label, applying a new one, or clarifying your carrier's labeling procedure. With zero citations in 90 days, enforcement appears dormant, but compliance remains mandatory.
Both involve placard placement, but 172.516(c)(6)—placard damaged, deteriorated, or obscured—is far more frequently cited: 1,796 all-time citations versus 1 for 172.406(e). Critically, 172.516(c)(6) has a 1.6% OOS rate, still low but 1.6 times higher than 172.406(e)'s 0.0% rate. The key difference: 172.406(e) addresses the requirement for a duplicate label specifically; 172.516(c)(6) covers general placard condition. If your placard is damaged or hard to read, you risk 172.516(c)(6). If you're missing a required second label, you risk 172.406(e).
Yes, if you transport hazmat, understanding duplicate labeling is part of compliance. 172.406(e) requires display of duplicate labels under specific shipment conditions. However, its rarity in enforcement—only 1 citation across 13 million inspections—suggests either widespread compliance or limited inspection focus on this specific rule. Consult your carrier's hazmat manual, FMCSA 49 CFR Part 172, and your dispatcher or safety team on when duplicate labels apply to your loads. Peer violations like 177.817(a) (placarding violations, 2,274 citations) are far more common, so prioritize broader placard accuracy and visibility.
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