§ 172.303 Prohibited marking.
Current through Sep 25, 2026 · Read all of Part 172
(a) No person may offer for transportation or transport a package which is marked with the proper shipping name, the identification number of a hazardous material or any other markings indicating that the material is hazardous (e.g., RQ, INHALATION HAZARD) unless the package contains the identified hazardous material or its residue.
(b) This section does not apply to—
(1) Transportation of a package in a transport vehicle or freight container if the package is not visible during transportation and is loaded by the shipper and unloaded by the shipper or consignee.
(2) Markings on a package which are securely covered in transportation.
(3) The marking of a shipping name on a package when the name describes a material not regulated under this subchapter.
(4) Identification number markings on a cargo tank motor vehicle containing a petroleum distillate fuel in accordance with § 172.336(c).
[Amdt. 172-123, 55 FR 52591, Dec. 21, 1990, as amended at 56 FR 66254, Dec. 20, 1991; 72 FR 55692, Oct. 1, 2007; 91 FR 1446, Jan. 14, 2026]
Interpretation letters (23)
- LQ Marking on Empty Bins — PHMSA, Mar 12, 2026
- “Hazardous Waste” markings — PHMSA, Jul 26, 2022
- Marking of Packages — PHMSA, Jan 30, 2020
- Non-hazardous materials package markings — PHMSA, Feb 11, 2019
- Identification Number Consistency on a Shipping Paper and Cargo Tank Marking — PHMSA, Oct 27, 2015
- Marking and Recordkeeping Requirements for Special Permit Cylinders — PHMSA, Jun 15, 2015
- Applicability of Prohibited Marking Provisions in § 172.303(b) — PHMSA, Mar 17, 2015
- Clarification of Marking Requirements Under Exception for Wet Batteries — PHMSA, Sep 30, 2014
- Applicability of the HMR to Reshipping Marine Pollutants Domestically — PHMSA, Dec 23, 2013
- Transporting Anatomical Parts by Motor Vehicle — PHMSA, Jul 10, 2013