# Hazardous Materials: Harmonization With International Standards
> **Pipeline and Hazardous Materials Safety Administration** · Final rule. · Published 2024-04-10 · Effective 2024-05-10 · 89 FR 25434
## Document
- **Document number:** 2024-06956
- **Category:** pipeline-safety
- **Sub-agency:** Pipeline and Hazardous Materials Safety Administration
- **Federal Register citation:** 89 FR 25434
- **CFR reference:** 49 CFR 171
- **Publication date:** 2024-04-10
- **Effective date:** 2024-05-10
- **DOT docket:** Docket No. PHMSA-2021-0092 (HM-215Q)
## Abstract

PHMSA is amending the Hazardous Materials Regulations (HMR) to maintain alignment with international regulations and standards by adopting various amendments, including changes to proper shipping names, hazard classes, packing groups, special provisions, packaging authorizations, air transport quantity limitations, and vessel stowage requirements. PHMSA is also withdrawing the unpublished November 28, 2022, Notice of Enforcement Policy Regarding International Standards on the use of select updated international standards in complying with the HMR during the pendency of this rulemaking.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/04/10/2024-06956/hazardous-materials-harmonization-with-international-standards)
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