35. The expert from OICA presented a status report from the Task Force on Hydrogen Regulations (TF-H2) (informal document GRSP-78-14-Rev.2). She recalled that liquefied hydrogen storage systems (LHSS) would be incorporated into the framework of the 1958 Agreement with a new UN Regulation, rather than expanding UN Regulation No. 134 (see agenda item 19). She further explained that the plan had been to directly transpose the optional part on LHSS from UN GTR No. 13, with only unavoidable corrections. On the issue of ISO 19887-1:2024, she noted that some members of TF-H2 considered it insufficient for verifying the mechanical integrity and durability of fuel lines used as components of a compressed hydrogen storage system (CHSS) and needed further discussion. Therefore, it had not been included in the proposal brought to this session (informal document GRSP-78-16-Rev.2). This proposal, however, did include Periodical Technical Inspection (PTI) requirements, following France’s suggestion in the previous GRSP session.

36. After an initial introduction by the experts from OICA and France and a subsequent revision of the initial proposals, GRSP adopted informal documents GRSP-78-22-Rev.2 and GRSP-78-16-Rev.2 (as reproduced in annex VII) and requested the secretariat to submit them as proposals for supplement 4 to the 02 series of amendments and supplement 1 to the 03 series of amendments to UN Regulation No. 134 to the June 2026 sessions of WP.29 and AC.1.

64. The World Forum considered draft amendments under agenda items 4.6.1 to 4.6.26. and recommended their submission to AC.1 for voting, with the following amendments:

1. For ECE/TRANS/WP.29/2026/54: In the title, replace “Supplement 4” by “Supplement 5”.
2. For ECE/TRANS/WP.29/2026/63: Modify the amendments to paragraphs 5.8.6.1. to 5.8.6.3. to read as follows: Paragraph 5.8.6.1., replace “owner’s manual” by “user’s manual”. Paragraph 5.8.6.1.2., at the end, before the comma, add “(if applicable)”. Paragraph 5.8.6.1.3., in the second sentence, after “driver”, add “and/or ADS”.
3. For ECE/TRANS/WP.29/2026/65: Modify the amendment to Annex 3, paragraph 1.4.3.11.1. to read as follows: Annex 3, paragraph 1.4.3.11.1., transfer the second sentence to a new paragraph and at the end of this new paragraph, add a new sentence to read: “For vehicles of category X, the “H” point of the most forward outboard passenger’s place shall be taken instead of the H-point of the driver’s place.”.
4. For ECE/TRANS/WP.29/2026/71: Delete the amendment to Annex 9, paragraph 3.
5. Where applicable, include the modifications as laid down in WP.29-199-10 and reproduced in Annex VI.

65. The World Forum considered draft amendments under agenda items 4.7.1 to 4.7.20 and recommended their submission to AC.1 for voting with the amendments laid down in informal document WP.29-199-10 and reproduced in Annex VI, where applicable.

66. The World Forum considered draft amendments under agenda items 4.8.1 to 4.8.15 and recommended their submission to AC.1 for voting, with the amendments laid down in informal document WP.29-199-10 and reproduced in Annex VI, where applicable.

68. The World Forum considered the draft amendments under agenda items 4.10.1 to 4.10.36, as modified, where applicable, by document WP.29-199-10 and reproduced in Annex VI. It recommended their submission to AC.1 for voting.

69. The World Forum considered draft amendments under agenda items 4.11.1 and 4.11.14 and recommended their submission to AC.1 for voting with the amendments laid down in informal document WP.29-199-10 and reproduced in Annex VI, where applicable.