Proposal for transitional provisions concerning the electronic stability control telltale and approval markings related to UN R121.

Proposal to enable the use of alternate colors (per footnote 18 of Table 1 and in line with ISO Standard 2575) for certain lighting tell-tales in order to indicate light source failures in response to the proposals for light failure indicators under UN Regulations Nos. 7, 48 and 87 (GRE/2016/7, GRE/2016/12 and GRE/2016/17) as adopted by GRE. This proposal anticipates use of the same approach in response to plans for additional failure indication requirements for other lighting regulations.

Proposal to apply footnote ¹⁸ to the symbol for tell-tale No. 1 (master lighting switch) in order to simplify the treatment of colour changes of tell-tales. Footnote ¹⁸ specifies "“Symbol may be shown in other colours than specified in column 5 in order to convey different meanings according to the general colour coding as proposed in paragraph 5. of ISO 2575-2004.” This proposal clarifies the existing understanding of the intent of the regulation and in particular addresses concerns over interpretation where tell-tales Nos. 1 and 19 have been combined.

Proposal to add a telltale and symbols for “Accident Emergency Call System (AECS)” and 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.

Proposal from the WP.29 Secretariat for additional corrections to the table of tell-tales, concerning items 31 (Combustion
pre-heat; engine start aid) and 32 (Choke (cold starting device)).

Proposal in line with ISO 2575 to allow for the use of different colors (e.g., red, yellow, green) to convey the status modes (e.g., failure, active) of seven functions via modification of footnote 18 under Table 1.

Proposal to apply the same tell-tale requirements for tyre pressure refill systems (TPRS) and central tyre inflation systems (CTIS) as already in place for tyre pressure monitoring systems (TPMS).

Proposal to clarify that the indicators, their identifications and the identifications of controls need not be illuminated when it is bright enough outside of the vehicle such as when daytime running lamps are operated.

Proposal to clarify that indicators, their identifications, and the identifications of controls need not be illuminated when the driver intentionally deactivates illumination and the electric vehicle is not in driving conditions.

Revised proposal intended to supersede the text proposed in GRSG/2024/4 (proposal to clarify that indicators, their identifications and identifications of controls need not be illuminated under certain conditions).

Proposal from the GRSG task force on Automated Vehicles Regulation Screening to enable application of UN R121 to ADS vehicles, including the exemption of vehicles of subcategory Y from the requirements of the Regulation.