GAR | WP.29/2026/136

WP.29/2026/136

Liquefied hydrogen storage: Proposal for a new UN Regulation

Source(s)

GRSP

Date

7 Apr 2026

Status

Formal WP.29 review

Subject

Liquefied hydrogen storage systems

Impact

Original text

Meeting(s)

WP.29 | Session 199 | 22-26 Jun

Agenda item 4.14.1. Proposal for a new UN Regulation on liquefied hydrogen storage systems

Proposal to establish a new UN Regulation on liquefied hydrogen storage systems (LHSS) for hydrogen-fuelled vehicles of categories M₂, M₃, N₂ and N₃, incorporating specifications for the LHSS, specific components including pressure relief devices and shut-off devices, and vehicle fuel system requirements with testing and approval procedures, based on GRSP/2025/41 and GRSP-78-15-Rev.1.

Downloads

UNECE server

Related documents

Excerpts from session reports

GRSP | Session 78 | 1-4 Dec 2025

41. The expert from OICA introduced informal document GRSP-78-15-Rev.1 amending ECE/TRANS/WP.29/GRSP/2025/41 with a proposal for a new UN Regulation on liquid hydrogen. GRSP adopted the proposal and requested the secretariat to submit it to the June 2026 sessions of WP.29 and AC.1. GRSP thanked the experts from TF-H2 for their work on this new UN Regulation, which would provide a type-approval basis for hydrogen vehicles propelled with liquefied hydrogen.

WP.29 | Session 198 | 9-13 Mar

30. The Vice-Chair of GRSP on behalf of Chair of GRSP reported on the results of the 78th session of GRSP (for details, see the report in ECE/TRANS/WP.29/GRSP/78).

31. The Vice-Chair informed WP.29 that GRSP had adopted amendments to UN Regulations Nos. 11, 12, 13, 14, 16, 17, 21, 29, 94, 95, 100, 127, 129, 134, 135, 137, 145, 153, 170, 173 and 174, a new UN Regulation on liquid hydrogen, an amendment to UN GTR No. 13 and a corrigendum to UN GTR No. 9, which would be presented to WP.29, AC.1 and AC.3 for consideration and voting on their June sessions. These amendments include those resulting from the review of existing UN Regulations related to Automated Driving Systems (ADS).

32. GRSP also approved a new Task Force on Emergency Door Opening (TF-EDO) and endorsed a request to AC.3 for authorization for a Phase 3 of the Informal Working Group on Electric Vehicle Safety (IWG-EVS). WP.29 endorsed this request for authorization for a Phase 3 of the IWG-EVS.

33. The Vice-Chair of GRSP informed WP.29 that the work in TF-EDO was progressing fast and that it had decided at its last meeting to request AC.3 for authorization to amend UN GTRs and to request WP.29 and AC.3 to be upgraded from a Task Force to an Informal Working Group. Several delegates expressed support for the work of the task force, agreed on its importance and urgency and looked forward to receiving the formal request in the next session of WP.29. The delegate from the Republic of Korea invited all interested experts to participate in the next meeting of TF-EDO, which would take place in Seoul.

34. Finally, GRSP elected by acclamation Mr. E. Wondimneh (United States of America) as Chair and Messrs. H. G. Kim (Republic of Korea) and V. Calzadilla García (Spain) as Vice-Chairs for the sessions of GRSP scheduled in the year 2026.