# refrigerated transport—road or refrigerated transport—marine systems — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)

For refrigerated transport, sector/subsector is refrigerated transport—road or refrigerated transport—marine systems; restriction type is installation; maximum gwp is named list; effective date is January 1, 2025; conditions is R-402A, R-402B, R-404A, R-407B, R-408A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-428A, R-434A, R-438A, R-507A, R-125/290/134a/600a (55/1/42.5/1.5), RS-44 (2003 formulation) or GHG-X5, recorded from its source on 2026-08-06.

- **Sector/subsector:** refrigerated transport—road or refrigerated transport—marine systems _(verified: appears in the quote below)_
- **Restriction type:** installation _(our reading, not quoted from the source)_
- **Maximum GWP:** named list
- **Effective date:** January 1, 2025 _(verified: appears in the quote below)_
- **Conditions:** R-402A, R-402B, R-404A, R-407B, R-408A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-428A, R-434A, R-438A, R-507A, R-125/290/134a/600a (55/1/42.5/1.5), RS-44 (2003 formulation) or GHG-X5 _(verified: appears in the quote below)_
- **CFR paragraph:** § 84.54(c)(8) _(our reading, not quoted from the source)_

## What the source says

> ( 8 ) Effective January 1, 2025, refrigerated transport—road or refrigerated transport—marine systems using any of the following: R-402A, R-402B, R-404A, R-407B, R-408A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-428A, R-434A, R-438A, R-507A, R-125/290/134a/600a (55/1/42.5/1.5), RS-44 (2003 formulation) or GHG-X5;

## Source

- https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-84

Last verified: 2026-08-06. Review by: 2027-02-02.
Part of [US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)](https://referencesource.org/aim-act-refrigerant-gwp-sector-limits/).