Proposal to correct paragraph 16.1.3.1. as follows: “The minimum and the average magnification factors of the CMS, in both horizontal and vertical directions shall not be lower than the minimum average magnification factors indicated below.” The latter reference to “minimum average” should be deleted since the subsequent text provides the required minimum and average magnification factors.

Proposal to establish procedures for the approval of non-seamless double and single wall gas tubes provided they can withstand the applicable tests according to Annex 15.

Proposal to correct the definition of “manual valve”, including deletion of the phrase “rigidly fixed to the cylinder or tank”. The definition of the manual valve as part of the accessories fitted to the container or tank (para. 4.16.) is different from the definition specified in paragraph 4.22. The proposed editorial change aims at clarifying the text of these definitions.

Proposal to align UN R121 with the 07 series of amendments to UN Regulation No. 16:

1. the term “seat belt” is replaced by “safety belt”,
2. the symbol for safety belt, defined in item 21 of Table 1 in the Regulation, may be displayed in different colours to convey different meanings. Therefore, the existing footnote 18 has been added to item 21, and
3. this symbol may be replaced by different symbols for seats other than those of the front row. Therefore, a new footnote 22 is added to item 21.

In addition, paragraph 5.1.5. is modified and paragraph 5.1.7. introduced to take into consideration the content of GRSP/59, page 24, regarding paragraphs 8.4.3.2.1. and 8.4.4. on safety-belt reminders for occupants of rear seat row(s). This proposal does not change any of the technical requirements of UN R121.

This proposal also aligns UN R121 with ISO 2575 per ISO Resolution 664 allowing for use of the diesel engine glow plug symbol with non-diesel technologies that (also) assist engine starting at low temperatures. The current text of the Regulation focuses on diesel engine glow plugs that assist in starting the engine at low temperatures.

Proposal to align the headform test with the deceleration measurement and the test of resistance to abrasion with ISO 15082:2016-11, including changes to the test details, correction of the headform calibration values, and the introduction of abrasion reference materials. The latter is combined with an abrasive-wheel qualification and a correction calculation (for plastic materials only).

PSG informal group proposal to correct the scope of the GTR in accordance with Part A of the GTR, its UN R43 counterpart, and corresponding regional/national interpretations and to align the impact test procedure description with that of UN R43 and ISO 3537.

Proposal to amend Figure 2a of Annex 21 to better reflect the meaning of paragraph 2.4.2.2. of Annex 21, mainly to clarify the lateral limits of any opaque obscuration in this area.

Proposal to introduce provisions for cargo-compartment refrigeration systems connected to the compressed natural gas (CNG) and/or liquefied natural gas (LNG) system(s).

Proposal to clarify the definitions of LPG container accessories to facilitate coordination between the separate, independent approvals required for the LPG container and for its accessories. The proposal aims to ensure proper coordination between container approvals (which involve testing with accessories attached) and accessory approvals (which may be subsequent to the original container approval and therefore, relevant to its validity).

Proposal to establish requirements for Blind Spot Information Systems (BSIS) intended to be fitted in heavy goods vehicles to protect vulnerable road users. This proposal is based on GRSG-109-19 and explained in presentations GRSG-110-18-Rev.1 and GRSG-111-24.

Updated proposal from the AECS informal working group for a new UN Regulation on accident emergency call systems and devices.