What 172.403G2 means in plain language
When you transport radioactive materials (Class 7 hazardous goods), the label on your vehicle must display the activity level of the radioactive content. That activity must be stated in SI units—the international standard measurement system used in hazmat regulations. A citation for 172.403G2 means either no activity information appeared on your Class 7 label at all, or the activity was listed in non-SI units (such as older imperial measurements) instead of the required becquerels or curies format.
This is a documentation and labeling issue specific to radioactive shipments. It doesn't directly regulate how the material is packaged, stored, or handled during transport—but the label itself is your vehicle's legal declaration of what's inside. Inspectors check that the label is complete and accurate before your vehicle leaves the dock.
What our enforcement data actually shows
Across our 13 million+ inspection records, 172.403G2 has generated only 4 all-time citations, with 1 citation in the last 12 months and 1 in the last 90 days. None of the 4 citations resulted in an out-of-service order—a 0.0% OOS rate. By comparison, the average FMCSR code triggers an out-of-service determination in 31.4% of cases. This means 172.403G2 is typically treated as a correctable labeling defect rather than a safety-critical violation that grounds your vehicle.
Ranked 2,480th out of 3,036 FMCSR codes by citation volume, this is an uncommon violation, reflecting that most carriers properly label radioactive shipments before dispatch. The rarity of enforcement suggests that when it occurs, it's often a clerical or formatting error caught at inspection rather than a systemic compliance failure.
Who gets cited most
Our inspection records show Texas with 1 citation in the last 180 days, all resulting in no out-of-service order. Because the data is sparse—only 4 citations in our entire database—geographic clustering is minimal. However, carriers transporting radioactive materials in concentrated regions are more likely to encounter inspectors familiar with Class 7 labeling requirements.
Our data shows fleets such as American Piping Inspection Inc (USDOT 1987749) with 3 citations for this code, and Flying A Pumping Services LLC (USDOT 3091334) with 1 citation. These citations do not imply negligence; they reflect enforcement activity among carriers regularly moving Class 7 materials. Even carriers with multiple citations show no out-of-service history for this particular code, indicating the violations were resolved through label correction or documentation updates.
How severe is this compared to similar codes
In the broader hazardous materials category, Class 7 labeling sits at the lower end of enforcement severity. Compare 172.403G2's 0.0% OOS rate to peer codes:
- 177.834A (general loading and unloading hazmat) appears in 3,954 citations with a 99.2% OOS rate—a dramatic difference that reflects the critical safety concerns around package handling and cargo securing.
- 172.502(a)(1) (placarding general requirements) shows 1,820 citations with an 18.5% OOS rate—still notably higher than 172.403G2, suggesting labeling format errors carry less immediate enforcement weight than missing placards entirely.
- 172.602(c)(1) (maintenance and accessibility of Emergency Response information) has 1,464 citations and a 0.0% OOS rate, matching 172.403G2. Both are treated as documentation and availability issues rather than hazards that require immediate vehicle removal.
Your citation is in the category of "fix it and move on" violations, not catastrophic compliance failures.
How to avoid it
Since this violation is rare and involves radioactive shipments specifically, prevention is most relevant if your carrier handles Class 7 materials:
- Verify SI unit formatting before every shipment. Activity must be in becquerels (Bq) or curies (Ci)—not older units. Cross-check your bill of lading against the label before leaving the facility.
- Conduct a pre-trip label audit. Walk around your vehicle and inspect all Class 7 labels for completeness. Ensure activity information is legible, accurate, and in the correct unit system. Our data shows co-occurrence with general labeling violations (172.403G and 172.203D6), so treat label checking as non-negotiable.
- Align with your dispatcher on label verification. If your carrier uses Ford, Kenworth, or Roll vehicles (the top makes we see cited for this code), establish a checkpoint where you or a safety officer physically confirm label accuracy before departure.
- Know the difference between Class 7 and other hazmat labels. Emergency response information (172.600C) appears in co-occurring violations, suggesting some drivers confuse Class 7 labeling rules with general placarding. Review your hazmat training materials to distinguish radioactive label requirements from other classes.
- Request label templates in SI units from your carrier. If your company's label generation system defaults to non-SI units, escalate the issue to safety management now, before it generates citations.
The fact that zero citations resulted in out-of-service orders means you're not facing immediate roadside consequences if stopped. But the citation will appear on your Motor Carrier Safety Report and affect your carrier's safety profile, so prevention is always preferable to remediation.