FMCSR 172.301: Hazmat Marking Defects — Driver Q&A

No. A 172.301 citation will not result in an out-of-service order. Across all-time inspection records in our database, this violation has never triggered an OOS placement—the OOS rate is 0.0%. However, other hazmat marking violations carry significantly higher OOS risk. For comparison, placarding violations under 177.817(a) are placed OOS 75.1% of the time, and general loading/unloading hazmat violations (177.834A-HMC) hit 99.2% OOS. If you've been cited for 172.301, you can typically continue operating while addressing the defect.

A 172.301 citation carries a CSA severity weight of 5 points. This weight is applied to your carrier's Unsafe Driving and Hazardous Materials BASIC scores. The actual CSA points you accumulate depend on how many citations you receive in a 12-month rolling window—each one counts, and your carrier's safety rating is built from the total. Because 172.301 is a marking defect rather than a loading or placarding violation, it typically results in lower OOS rates than related hazmat codes, but the points still contribute to your carrier's safety profile.

Immediate steps:

1. Document the defect — photograph the damaged or missing marking on the package or container.
2. Correct the marking — apply proper hazmat markings per DOT requirements before moving the shipment.
3. Notify your dispatcher/fleet manager — report the citation and the corrective action taken.
4. Request inspection records — ask for a copy of the roadside inspection report to confirm the specific marking deficiency cited.
5. Review your hazmat procedures — work with your safety team to prevent repeat citations. Check marking application, storage, and periodic inspection routines.

Since 172.301 is not OOS-eligible, there is no immediate operational shutdown, but correction should happen before the next load move.

172.301 is relatively low-severity within the hazmat category, based on OOS enforcement patterns. Our inspection data shows this code has never resulted in an out-of-service placement (0.0% OOS rate). In contrast, similar hazmat marking and loading violations show much higher enforcement intensity: placarding violations (177.817(a)) are OOS 75.1% of the time with 2,274 citations, and general hazmat loading violations (177.834A-HMC) are OOS 99.2% of the time with 3,954 citations. The 172.301 defect—improper marking on a package—is treated as a documentation/labeling issue rather than an immediate safety threat, which is why it doesn't trigger roadside removal.

Yes, you can contest a 172.301 citation through the DataQs (Roadside Data Quality Program) process. Because this violation involves marking inspection at roadside, you can challenge it if: the inspector misidentified the marking, the marking was actually compliant and the inspector made an error, or the citation was recorded incorrectly in the inspection report. To file, access the DataQs portal through FMCSA's website, locate your inspection record, and submit a documented challenge with photos or evidence showing proper marking. Contested citations can take 30–60 days to review. Focus on technical accuracy: was the marking actually present and compliant, or was the inspector mistaken about the standard?

Fix it before your next shipment moves. Although 172.301 is not OOS-eligible—meaning you won't be sidelined—the defect is a regulatory compliance issue that must be corrected. The citation itself flags improper marking, which creates liability for both you and your carrier. Our inspection records show zero citations for 172.301 in the last 90 days and across the last 12 months, suggesting this violation is uncommon, but that also means inspectors are watching for it. Correct the marking (apply or repair the hazmat label) immediately to avoid a repeat citation and to ensure the shipment remains compliant with DOT hazmat rules.

Our inspection database has recorded zero citations for 172.301 in the entire all-time dataset. This means 172.301 is either extremely rare in enforcement or rarely cited in standard roadside inspections across all states. By contrast, related hazmat violations like placarding defects (177.817(e)) and general loading violations (177.834(a)) are cited thousands of times. This rarity suggests that hazmat marking defects may be caught during warehouse or dispatch checks rather than at roadside, or that marking standards are being met more consistently. If you operate hazmat, focus prevention efforts on the more commonly cited violations like 177.817 (placarding) and 177.834 (loading/unloading).

A 172.301 citation is recorded against both the driver and the carrier in FMCSA's system. The violation appears on the carrier's safety record and contributes to fleet CSA scores (Unsafe Driving and Hazardous Materials BASIC categories), affecting insurance rates, audits, and customer perception. The driver's record also reflects the citation, which may impact employment decisions or safety rankings within the fleet. Because hazmat compliance is a shared responsibility—the driver handles the load, the carrier oversees procedures—both parties share the citation weight. Your carrier's fleet manager will typically review the citation to identify whether it stems from driver error, inadequate marking procedures, or shipper-provided materials.