FMCSR 172.505C: Subsidiary Placard Violations Q&A

Yes, there's a 66.7% chance your truck will be placed out of service for this violation. Across our inspection records, 2 out of 3 citations for 172.505C resulted in an immediate out-of-service order. This is more than double the national average out-of-service rate of 31.4% across all FMCSR codes, meaning inspectors treat this placard violation seriously.

172.505C is less common but more aggressive than some similar violations. Our database shows only 3 all-time citations for this code, making it rank #2551 out of 3,036 FMCSR codes. However, peer placarding violations like 177.817(a) carry a 75.1% out-of-service rate. The 66.7% OOS rate for 172.505C puts it in the mid-to-high severity range for hazmat compliance issues.

First: do not move the vehicle if it has been placed out-of-service. Verify with the inspector that the subsidiary placard is actually missing or illegible for materials that are dangerous when wet. Second: contact your dispatcher or compliance officer to document the citation number and inspector badge. Third: review your bill of lading and shipping papers to confirm what hazardous materials were on board. Fourth: arrange for the placard to be properly applied before any movement is authorized.

This violation falls to the carrier under FMCSA's safety rating system. Your company is responsible for ensuring all hazardous materials shipments are properly placarded before leaving the dock. The citation will appear on the carrier's CSA safety record, not your personal driving record. However, if you accepted a load without verifying placarding, your company may hold you accountable internally.

Zero citations in the last 12 months, according to our 13 million+ inspection database. The 3 all-time citations were recorded before that period. This is an extremely rare violation, which suggests either strong compliance across the industry or very infrequent inspection for this specific placard requirement.

Yes, you can contest this citation through the DataQS (Dispute Resolution) process if you believe the inspector's finding is factually incorrect. You have 90 days from the inspection date to submit a request. For a placard violation, gather photos showing the subsidiary placard was present and legible at the time of inspection, or documentation proving the material did not meet the "dangerous when wet" criteria. FMCSA will review your evidence and determine if the citation should be removed.

Our records show three carriers cited for this violation: SAIA MOTOR FREIGHT LINE LLC (1 citation), LANGE-THOMPSON INC (1 citation), and ECO TRANSPORTES INTERNACIONALES SA DE CV (1 citation). Each carrier received one citation all-time. This wide distribution across different carriers indicates no single operation is particularly prone to this violation.

This violation is extremely stable and rare. Zero citations in the last 90 days and zero in the last 12 months suggest either strong industry compliance or minimal inspection focus on this specific subsidiary placard requirement. With only 3 all-time citations across 13 million roadside inspections, there is no trend of deterioration.