28. The expert from ISO presented GRSG-112-38 justifying the need to harmonize the requirements on Compressed Natural Gas (CNG) and/or Liquefied Natural Gas (LNG) vehicles in UN Regulation No. 110 with those in the latest version of ISO 11439:2013 (as proposed in ECE/TRANS/WP.29/GRSG/2016/22). He recalled the comments received by GRSG experts during the last sessions (mainly on GRSG-111-02-Rev.1 and GRSG-112-05) and announced his intention to prepare, in due time, a revised official document for consideration at the next GRSG sessions, including transitional provisions.

29. The expert from the Netherlands introduced ECE/TRANS/WP.29/GRSG/2017/4 aimed at correcting an error in the definitions related to the manual valve. GRSG noted a number of comments and adopted ECE/TRANS/WP.29/GRSG/2017/4 as reproduced below. The secretariat was requested to submit it to WP.29 and AC.1 as draft Supplement 7 to the 01 series of amendment and as draft Supplement 1 to the 02 series of amendments to UN Regulation No. 110, for consideration at their November 2017 sessions.

Paragraph 4.16.1., amend to read:
“4.16.1. “Manual valve”: as defined in paragraph 4.22. that is rigidly fixed to the cylinder or tank."
Paragraph 4.16.3., amend to read:
“4.16.3. “Excess flow valve”: as defined in paragraph 4.21."
Paragraph 4.22., amend to read:
“4.22. “Manual valve” means a valve which is operated manually."

30. The expert from France introduced ECE/TRANS/WP.29/GRSG/2017/9 incorporating provisions concerning refrigeration systems for cooling the cargo compartment which were connected to the CNG and/or LNG system. GRSG noted general support. GRSG adopted document ECE/TRANS/WP.29/GRSG/2017/9 as amended below. The secretariat was requested to submit it to WP.29 and AC.1 as part (see para. 29 above) of draft Supplement 1 to the 02 series of amendments to UN Regulation No. 110 for consideration at their November 2017 sessions.

In paragraph 18.5.1.3., replace “GNC/GNL” to read “CNG/LNG” (twice).

31. The expert from the International Association of Fire and Rescue Services (CTIF) gave a presentation (GRSG-112-06) on the need to harmonize the identification of propulsion and energy storage systems in vehicles to reduce the risks for rescuers during their interventions in case of severe road accidents. He informed GRSG about their cooperation with ISO on this subject and the work progress done. He expected that the new standard ISO 17840‐4 would be published in near future. He underlined that the location or position of labels on the vehicle or in the emergency response guide was outside the scope of the ISO standard. Thus, he sought the advice of GRSG experts on how to address this problem within the UN vehicle regulations. GRSG welcomed the information and had a detailed exchange of views on the best way to move forward, either as amendments to existing UN regulations or as a new guideline document to be annexed to one or the other resolutions on the construction of vehicles. Following the discussion, GRSG preferred to wait for the final publication of the ISO standard and invited the expert from CTIF to prepare in the meantime concrete proposals for possible amendments to UN Regulations Nos. 67 (LPG vehicles), 100 (Electric power trained vehicles), 110 (CNG/LNG vehicles), 134 (Hydrogen and Fuel Cell Vehicles) and the new UN Regulation on AECS. GRSG agreed to resume consideration of this item at its next session in October 2017.

32. Reporting on some cases of structural failures of cylinders in his country, the expert from Italy proposed amendments to Annex 3A on the test requirements for the periodic requalification of cylinders (GRSG-112-28). The expert from Finland stated that these test requirements on periodical inspections of CNG/LNG vehicles in use were only recommendations to be taken into account during the type approval procedure of a new type of vehicle. GRSG noted that Contracting Parties were used to perform on their national level the periodical technical inspections in different ways. Referring to GRSG-112-32 presented under agenda item 7 (see para. 26 above), the expert from Germany introduced GRSG-112-33 proposing to also strengthen the requirements in UN Regulation No. 110 for the installation on vehicles of CNG-cylinders, LNG-tanks and their accessories as well as for their subsequent inspection of without the need of disassembling the containers.

33. GRSG noted general support on the proposals. The Chair invited all GRSG experts to send their comments, in due time, to the experts from Germany and Italy. GRSG agreed to resume consideration of this subject at its next session on the basis of official documents, prepared by Germany and Italy, taking into account the comments received.