Direct answers about 172.326B citations: OOS rates, what to do next, and how this hazmat violation compares to similar violations.
Ranks #2,567 of 3,146 FMCSR codes by citation frequency • OOS rate of 0.0% is below the FMCSR-wide average of 33.3%.
Portable tank not marked with owner or lessee name
Direct answers grounded in TruckCodex inspection data
No. Across all our inspection records, 172.326B citations have resulted in a 0.0% out-of-service rate. All 3 citations in our database were issued without placing the vehicle out of service. This is significantly lower than the all-FMCSR average OOS rate of 31.4%, making this one of the least severe hazmat marking violations you can receive.
Very rare. Our database of 13 million+ roadside inspections shows only 3 all-time citations for 172.326B, ranking it #2,551 out of 3,036 FMCSR codes by citation volume. In the last 90 days, we recorded zero citations. The last citation appeared in November 2025, suggesting this violation is infrequently encountered in the field.
First, verify the portable tank is properly marked with the owner or lessee name as required. If it wasn't, contact your carrier or equipment owner immediately to correct the marking. Since 172.326B is not OOS-eligible, you can typically continue operations, but document the correction for your safety records. If you believe the citation is in error, gather documentation proving the tank was properly marked and consider filing a DataQs (DataQs/RDR) challenge through FMCSA within your state's filing window.
No, it's among the least serious. While peer hazmat codes like 177.834A (general loading/unloading) carry a 99.2% OOS rate and 177.817(a) (placarding) has a 75.1% OOS rate, 172.326B has a 0.0% OOS rate. It's more comparable to 172.516(c)(6) (placard damage deterioration) at 1.6% OOS and 172.602(c)(1) (emergency response information) at 0.0% OOS—documentation and marking issues rather than operational hazards.
Yes, you can file a DataQs (DataQs/RDR) challenge through FMCSA if you believe the citation is incorrect. Since 172.326B is a marking/documentation violation, you'll need evidence that the portable tank was actually marked with the owner or lessee name at the time of inspection. Gather photos, maintenance records, or tank documentation. Submit your challenge through your state's DataQs portal within the required timeframe—typically 60 days from the inspection.
Over the last 180 days, our inspection data shows only Texas with 1 citation and a 0.0% OOS rate. With only 3 all-time citations spread across the country, this violation is so infrequent that no clear geographic pattern emerges. Most states have zero citations on record.
Low urgency for safety operations, but address it promptly for compliance. Since 172.326B has a 0.0% OOS rate and only 1 citation in the last 12 months, roadside enforcement is rare. However, ensure the portable tank is correctly marked with the owner or lessee name to stay compliant. This is a straightforward marking correction—paint or label application—that takes minimal time and cost.
Our all-time data shows three carriers received 172.326B citations: Industrial Oils Inc (USDOT 351238), SSI Services LLC (USDOT 1763714), and RDL Transportation Inc (USDOT 2447861). Each received exactly 1 citation. The violation appeared on Kenworth and Ford vehicles in our records, though the sample size is too small to identify a carrier or equipment trend.
TruckCodex aggregates official public-sector datasets. See the Source registry for dataset-level coverage and the Freshness log for last-import timestamps.
Census, SAFER, SMS, Licensing & Insurance (L&I), roadside inspections, crashes, and authority history.
Vehicle recall campaigns, defect investigations, and consumer safety complaints (SCRS).
Cross-border carrier registry and Canadian recall campaigns where applicable.
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