# 2025-12100: Shipping Fridge Giants with Flammables: New DOT Rules Approved

2025-12100, Hazardous Materials: Adoption of Department of Transportation Special Permit 21379, is a Federal Register proposed rule from Transportation Department, Pipeline and Hazardous Materials Safety Administration published 2025-07-01, effective The new rules kick in soon, so shippers should get ready to roll with the changes! (as of 2026-06-08).

- Canonical: https://policyrisk.com/federal-register/2025-12100
- As of: 2026-06-08
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-12100
- Title: Hazardous Materials: Adoption of Department of Transportation Special Permit 21379
- Type: Proposed Rule
- Agencies: Transportation Department; Pipeline and Hazardous Materials Safety Administration
- Citation: 90 FR 28552
- Published: 2025-07-01
- Effective: The new rules kick in soon, so shippers should get ready to roll with the changes!
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: 2137-AG16
- Last updated: 2026-06-08

## In one line

Shipping Fridge Giants with Flammables: New DOT Rules Approved

## Summary

This update lets companies ship big refrigerating machines with flammable gases more easily and safely by making special rules official. It helps businesses save time and avoid extra paperwork while keeping everyone safe. The new rules kick in soon, so shippers should get ready to roll with the changes!

## Abstract

This NPRM proposes to adopt the provisions of DOT special permit (SP) 21379 into the hazardous materials regulations to streamline the transportation of large refrigerating machines filled with flammable gases.

## Effects PRIA read

- Streamlined transport for flammable refrigerants: benefit, medium. The rule would adopt DOT special permit 21379 into the hazardous materials regulations so companies can ship large refrigerating machines filled with flammable gases under the special-permit provisions. This makes the special rules official, reduces paperwork, and helps businesses move these machin…

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## Sources
- [2025-12100 on federalregister.gov](https://www.federalregister.gov/documents/2025/07/01/2025-12100/hazardous-materials-adoption-of-department-of-transportation-special-permit-21379)
- [2025-12100 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-07-01/pdf/2025-12100.pdf)

## Related
- [Previous: 2025-12099, Hazardous Materials: Adoption of Department of Transportation Special Permits 1…](https://policyrisk.com/federal-register/2025-12099)
- [Next: 2025-12102, Deregulatory-Establishing United States Citizenship for MARAD Program Participa…](https://policyrisk.com/federal-register/2025-12102)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2025-12100 (as of 2026-06-08).