FMCSR 172.401(a) Q&A: Citations, Out-of-Service Risk & Next Steps

No. Across our 13 million inspection records, 172.401(a) has never resulted in an out-of-service order. The OOS rate for this violation is 0.0%—all 9 citations in our database were issued without placing the vehicle out of service. This is dramatically lower than the 31.4% average OOS rate across all FMCSR codes, making 172.401(a) one of the least severe hazmat citations you can receive.

Very rarely. Our inspection records show only 9 citations for 172.401(a) all-time, with zero citations in the last 12 months and zero in the last 90 days. This code ranks #2230 out of 3,036 FMCSR codes by citation volume. The enforcement activity on this violation is so low that if you're cited for it, you're dealing with an uncommon finding—which may indicate either a legitimate compliance gap or a documentation error worth examining.

First: document the citation and gather supporting paperwork (manifests, shipping papers, load records). Second: review the specific finding—whether it's a documentation deficiency or actual product handling issue. Third: contact your carrier's compliance or safety manager immediately, especially if you work for a larger fleet, as this will likely trigger a review of similar shipments or procedures. Fourth: preserve any communications, photos, or logs from the date of citation. Fifth: determine if you want to contest through DataQs if the inspector's finding contradicts your records or procedure.

No, it's among the least serious. Peer codes in the hazmat category show vastly higher OOS rates: 177.834A-HMC has a 99.2% OOS rate (3,954 citations), 177.834(a) is 97.9% (3,839 citations), and 177.817(a) is 75.1% (2,274 citations). By contrast, 172.401(a) has a 0.0% OOS rate across all citations. Even 172.602(c)(1)—maintenance of emergency response info—also sits at 0.0% but is cited 163 times more frequently. Your citation is low-severity, though still worth addressing for compliance.

Our records show ACE HARDWARE CORPORATION (USDOT 76209) with 2 citations, and seven other carriers with 1 citation each: CONNELL RESOURCES INC, EMERALD SERVICES INC, PROFLAME INC, AMERICAN CYLINDER LLC, CLINTON HELGET, SOUTHEASTERN FREIGHT LINES INC, and NORTHX LOGISTICS LTD. The violation is too rare to identify a pattern by carrier type, but if you work for one of these companies, there may be a specific procedural gap worth investigating internally.

Yes, you can challenge any roadside inspection finding through the DataQs system. Submit your contest within 90 days of the inspection date. DataQs works best when the violation is factual—e.g., the inspector documented a paperwork deficiency but you have proof the required document was present, or the inspector misread a manifest. If the finding is based on the inspector's observation of your actual handling or loading practice, contesting is harder but still possible if you have witness statements or video evidence contradicting the observation.

Across our database, PETERBILT appears in 3 citations, followed by GREAT DANE, FORD, VOLVO, and UTILITY trailers with 2 each. INTERNATIO, MAXX-D, and FREIGHTLIN each have 1. The distribution is too sparse to indicate a vehicle-type vulnerability, suggesting the violation is tied to carrier procedures or driver training rather than equipment design.

Lower urgency than most hazmat citations, but not zero. Since 172.401(a) has never resulted in out-of-service placement and is rarely cited, the FMCSA may not be actively targeting this violation. However, the enforcement gap (zero citations in 90 days, nine all-time) suggests spotty inspector familiarity—which means your citation may indicate a genuine compliance problem your carrier overlooked. Address it within 30 days by confirming the requirement with your safety manager and reviewing training for your team.