PHMSA Proposes Updates to Hazardous Materials Regulations
The Pipeline and Hazardous Materials Safety Administration (PHMSA) has issued a Notice of Proposed Rulemaking (NPRM) that would update the U.S. Hazardous Materials Regulations (HMR) to align more closely with international transportation standards.
The proposal, designated HM-215R, represents the latest step in PHMSA’s ongoing effort to harmonize U.S. hazmat regulations with global frameworks such as the United Nations Model Regulations, the International Maritime Dangerous Goods (IMDG) Code, and the International Civil Aviation Organization (ICAO) Technical Instructions. For propane marketers and fuel distributors, these updates may affect how hazardous materials are classified, packaged, and documented during transportation.
Continuing the International Harmonization Process
PHMSA routinely updates the HMR through a biennial rulemaking process designed to maintain consistency with international standards governing hazardous materials transportation. These updates help to ensure that products moving across international supply chains follow a consistent set of safety and labeling requirements.
The proposed rule would incorporate changes from the most recent international updates, including the 2025–2026 ICAO Technical Instructions, Amendment 42-24 to the IMDG Code, and the 23rd revised edition of the UN Model Regulations. Previous harmonization updates were finalized in April 2024. The new proposal continues that process by adjusting U.S. rules where international standards have evolved.
Key Areas of Proposed Changes
While the rulemaking addresses a wide range of hazardous materials, several categories of changes could affect propane and fuel distributors. One area involves updates to the Hazardous Materials Table (HMT), which contains the official shipping names, hazard classifications, and regulatory references used when transporting hazardous materials. Proposed revisions may add, remove, or modify entries in the table, affecting how certain products must be described on shipping papers. Another category involves packaging authorizations and technical standards. These updates may affect requirements for certain packaging types, including bulk containers and cylinders used in hazardous materials transport.
The proposal also incorporates updated technical standards from the International Organization for Standardization (ISO) and other global safety organizations. These references help standardize packaging and testing requirements used throughout international transport systems. While propane itself (UN1075) is already well established within the regulatory framework, broader updates to documentation, packaging references, and classification procedures can still affect operational practices.
Operational Considerations for Propane Businesses
For propane retailers and fuel distributors, regulatory changes related to hazardous materials transport often require operational adjustments across several areas of the business. Shipping documentation may need to be reviewed and updated to ensure that hazard classifications, proper shipping names, and regulatory references match the updated HMR requirements.
Employee training programs may also need revision. Federal law requires hazmat employees to receive training that reflects current regulatory requirements. When rules change, companies must ensure that drivers, dispatchers, and operations personnel understand any updates affecting packaging, labeling, or documentation.
In addition, propane companies that transport cylinders, tanks, or other hazardous materials equipment may need to review packaging standards and equipment certifications referenced in the updated rules.
Because many propane distribution operations rely on multiple transportation modes, including highway transport and, in some cases, rail or marine logistics, changes to international standards can influence multiple parts of the supply chain.
Opportunity for Industry Input
PHMSA’s proposed rule is currently open for public comment, with the comment period scheduled to close on April 13, 2026. Industry participants, including propane marketers, transportation providers, and equipment manufacturers, have the opportunity to submit feedback regarding potential operational impacts or areas where clarification may be needed. Regulatory agencies often consider industry input when finalizing harmonization rules, particularly when changes affect large sectors of the energy supply chain.
Preparing for Potential Changes
Although the proposal remains in the rulemaking stage, propane businesses may benefit from reviewing the proposed amendments and identifying any areas that could affect their operations. Companies that monitor regulatory developments early are typically better prepared to update training programs, documentation procedures, and internal compliance systems once final rules are issued.
For propane retailers and fuel distributors, maintaining compliance with hazardous materials regulations remains a critical part of safe operations and regulatory oversight. The proposed updates represent another step in aligning U.S. transport standards with global safety frameworks while maintaining consistency across international supply chains.
