This is a proposal, not a final rule
The Pipeline and Hazardous Materials Safety Administration published HM-215S on October 27 as a notice of proposed rulemaking. The agency is accepting comments through December 28, 2026. No compliance date has been set because the proposal is not final.
PHMSA proposes to align parts of the Hazardous Materials Regulations with updated international standards, including changes involving proper shipping names, hazard classes, packing groups, special provisions, packaging authorizations, air-transport quantity limits and vessel stowage.
What road carriers should watch
The 44-page proposal would revise several parts of 49 CFR, including provisions that can affect how hazardous materials are classified, described, packaged, marked, labeled or placarded before road transport. It also contains mode-specific changes, so not every proposal applies to a highway driver or motor carrier.
PHMSA says the package is intended to maintain safety while reducing conflicts between U.S. and international requirements. Those are agency projections for the proposed rule; they are not proof of a final cost or safety outcome.
Current requirements remain in force
Drivers, carriers and offerors must continue following the current Hazardous Materials Regulations, shipping-paper rules, training requirements, packaging limits and placarding duties unless and until PHMSA publishes a final rule with applicable dates.
Anyone commenting should use docket PHMSA-2025-0048, HM-215S. Before changing a route, load plan, shipping description, package or placard, verify the final rule and effective or compliance dates rather than relying on the proposal alone.
Primary sources and supporting records
- Pipeline and Hazardous Materials Safety Administration: Hazardous Materials: Harmonization With International StandardsPrimary agency page identifying the action as an NPRM and summarizing the proposed subject areas • Published 2026-10-27 • Checked November 2, 2026 at 7:18 AM
- U.S. Government Publishing Office / Federal Register: 91 FR 67720 — Hazardous Materials: Harmonization With International StandardsControlling published proposal establishing docket HM-215S, affected CFR parts, proposal details and the December 28 comment deadline • Published 2026-10-27 • Checked November 2, 2026 at 7:18 AM
- Regulations.gov: Docket PHMSA-2025-0048Official public docket for supporting material and comments • Checked November 2, 2026 at 7:18 AM
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