HM-265 final rule sets new regulatory expectations
For anyone who ships, transports, or works around hazardous materials, this update is worth your attention. It targets unnecessary compliance burdens while maintaining established safety standards in hazmat transportation. These changes affect fuel haulers, packaging manufacturers, cargo tank facilities, and others across the hazardous materials industry. The Pipeline and Hazardous Materials Safety Administration (PHMSA) published its HM‑265 Final Rule, Hazardous Materials: Eliminating Unnecessary Regulatory Burdens on Fuel Transportation, to implement these adjustments.
PHMSA included staggered dates for compliance, with a voluntary compliance date of January 14, 2026, and a mandatory effective date of February 13, 2026. Companies can begin using the new rule immediately because of the voluntary date. However, they don’t need to be fully compliant until the mandatory effective date.
What changed
PHMSA adopted several targeted amendments to the Hazardous Materials Regulations (HMR). Here are the major updates:
- Identification numbers for petroleum distillate fuels:
PHMSA reinstated an older, previously removed exception where cargo tank motor vehicles (CTMVs) transporting more than one petroleum distillate fuel (like gasoline, diesel, kerosene, or fuel oil) on different trips during the same or previous business day may now display the UN/ID number of the fuel with the lowest flash point. For most, that means UN1203 (gasoline).
This eliminates the need for carriers to constantly swap placards as loads change, restoring a long standing practice and saving significant labor and cost.
PHMSA maintained an important limitation: this exception does NOT apply to gasoline/ethanol blends containing more than 10% ethanol, since those fuels require different emergency response procedures.
- Electronic submission for cargo tank facility registration:
Facilities that manufacture, assemble, repair, or inspect cargo tanks can now submit registration statements electronically through FMCSA’s online portal.
- Updated incorporation by reference (chlorine tank guidance):
PHMSA replaced older incorporated drawings with the complete Chlorine Institute Pamphlet 49 (2016). This change authorizes the use of the Midland PRD for chlorine cargo tanks, expanding options for compliant pressure relief devices.
- Training relief for packaging- only hazmat employees:
Employees who only manufacture, repair, test, or recondition packagings, and do not offer or transport hazmat, are now excepted from safety and security awareness training requirements under 172.704.
- Reflective design options for uninsulated cargo tanks:
Instead of requiring reflective paint, CTMVs may now use reflective vinyl wraps or other coverings if they meet reflectivity requirements.
- Allowing cameras for cargo tank inspections:
Inspectors may now use video cameras or fiber optic equipment to perform required visual inspections of cargo tanks, reducing risks associated with climbing inside tanks and enhancing efficiency.
Key to remember: The HM-265 Final Rule is focused on eliminating unnecessary burdens on fuel transportation. The mandatory compliance date starts on February 13, 2026, which is when you need to comply with the rule.













































