20 Mar 2025 UN R154: Request for review and/or approval (UK, OICA, Japan, and EC) GRPE-92-06 2025-03-20 Review on the possible direction (1) new series of amendment (2)single series structure UK OICA Japan EC
20 Mar 2025 UN R154: Proposal for series of amendments (Sweden, UK, Switzerland, OICA, Korea, Japan, EC, and Germany) GRPE-92-09 2025-03-20 Sweden UK Switzerland OICA Korea Japan EC Germany
17 Oct 2025 UN R154: Proposal for new series of amendment (excluding Level 1C) (EC, Japan, OICA, and UK) GRPE-93-29 2025-10-17 EC Japan OICA UK
16 Oct 2025 UN R154: Explanatory document of the proposals for amendments (Japan, OICA, UK, and EC) GRPE-93-31/Rev.2 2025-10-16 Japan OICA UK EC
6 Nov 2025 IWVTA: Small-Volume Manufacturers (SVM) (Japan) IWVTA-49-06 2025-11-06 Japan
17 Jan 2025 UN R154: Observations on implementation of Euro 7 provisions (Japan) WLTP-AH-03-02 2025-01-17 Japan
16 Mar 2025 UN R154: Proposal for new series of amendments (EC, Japan, Korea, OICA, Sweden, Switzerland, and UK) WLTP-AH-04-05 2025-03-16 Draft proposal to align the Regulation with the latest regional requirements (e.g., Euro 7) as submitted to GRPE (Informal document GRPE-92-09e). EC Japan Korea OICA Sweden Switzerland UK
13 Sep 2025 UN R154: Comments on draft 04 series of amendments (France and Japan) WLTP-AH-LDN-04/Rev.1 2025-09-13 France Japan
18 Sep 2025 UN R154: Comments and amendments to the proposal for a new series (GRPE/2025/15) (Japan) WLTP-AH-LDN-16 2025-09-18 Japan
27 Nov 2025 UN R154: Comments on application of levels in draft series of amendments (Japan) WLTP-AH-08-01/Rev.1 2025-11-27 Japan
13 Oct 2025 UN R154: Updates concerning OVC-HFCV (Japan) WLTP-AH-GVA-02 2025-10-13 UN R154 specifies unique identifiers for vehicle families in the format FT-nnnnnnnnnnnnnnn-WMI, where FT designates family type: IP for Interpolation family, RL for Road load family, RM for Road load matrix family, PR for Periodically regenerating systems family, AT for ATCT family, EV for Evaporative emissions family, DF for Durability family, OB for OBD family, ER for Exhaust after-treatment system using reagent family, GV for Gas Fuelled Vehicle family, KC for KCO₂ correction factor family, RT for Low temperature range family, MF for Monitor family, BD for Battery Durability family, VD for virtual distance family, and LP for Lower limit pressure family. The document establishes reporting requirements for fuel consumption, electric energy consumption, and fuel efficiency for various vehicle types including OVC-FCHVs and NOVC-FCHVs, with driving range of hydrogen calculated according to specified procedures. Japan