No NON-ODORIZED entry for LPG Portable Tanks
172.326D is a Documentation - HM violation under 49 CFR §172.326D. It falls in the Hazardous Materials Compliance BASIC with a severity weight of 3/10.
Last updated May 2026
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Notes
DSMS: N | Comment: Added in 3.0.9 | Footnote: This violation was applied retroactively in the SMS with the April 27, 2018 run.If this violation was written incorrectly, here are the angles trucking-safety managers use to contest it. Playbook: Hazardous Materials.
Common ways to challenge this code
The materials transported did not exceed the threshold quantities requiring placards under 49 CFR Part 172 Subpart F.
Evidence that wins
This administrative code is on the inspection report but does not contribute to CSA BASIC scoring per FMCSA SMS Methodology Appendix A.
Evidence that wins
Common pitfalls — avoid these
Same BASIC category — ranked by national citation volume
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HM (106A/110AW Multi-Unit Tank Car Tanks) - Improper safety relief device.
HM (Packaging) - DOT 412 general requirements.
HM (Packaging) - MC 312 improper venting requirements.
HM (Packaging) - MC 306 manhole requirements.
HM (Packaging) - MC 306/307/312 piping protection.
Codes under the same FMCSA violation group
HM (Emergency Response) - Failing to instruct the operator of a motor vehicle to contact the carrier in the event of an HM incident.
HM RAM (Shipping Papers) - Shipper HM shipping paper does not list DOE/NRC package approval notation as required.
HM RAM (Shipping Papers) - Shipper HM shipping paper does not list fissile radioactive entry as required.
No temperature controls noted for Class 4.1 or Class 5.2
HM (Emergency Response) - Failing to comply with the carrier contact information requirements when disconnected from motive power.
HM (Markings) - Offering a multi-unit tank car tank containing liquefied petroleum gas without "NOT/NON-ODORIZED" marking as required.
172.326D is the FMCSA roadside-inspection violation code for "No NON-ODORIZED entry for LPG Portable Tanks", part of the Documentation - HM group, cited under 49 CFR §172.326D.
172.326D falls under the Hazardous Materials Compliance BASIC in the FMCSA Safety Measurement System (SMS).
172.326D carries a severity weight of 3 out of 10. Higher weights indicate violations more closely tied to crash risk, and they count more toward a carrier's Hazardous Materials Compliance score.
No. 172.326D is not an out-of-service violation, so on its own it does not trigger an out-of-service order at the roadside.
The point contribution of 172.326D depends on its severity weight (3/10) multiplied by a time weight of 3, 2, or 1 based on how recent the inspection is. You can calculate the exact contribution with the CSA points calculator.
Yes. If you believe 172.326D was recorded in error, you can file a Request for Data Review (RDR) through the FMCSA DataQs system with supporting evidence. A successful challenge can remove or correct the violation on your record.
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