Document for reference containing transitional provisions applicable to the 01, 02, and 03 series of amendments to UN R74. For the 01 series: Contracting Parties shall grant approvals only if vehicle types with regard to number and mode of installation of lighting and light-signalling devices correspond to requirements, with 24 months entry into force and a four-year grace period. For the 02 series: Contracting Parties shall not be obliged to accept type-approvals to the preceding series first issued after 1 September 2023, with continued acceptance until 1 September 2028 for approvals first issued before that date. For the 03 series: Contracting Parties shall not be obliged to accept type-approvals to the preceding series first issued after 1 September 2028, with acceptance required until 1 September 2030 for approvals first issued before that date.

Proposal to simplify definitions by referring to UN Regulation No. 48 definitions, replace terminology (e.g., ‘vehicle type (moped)’ with ‘type of vehicles of category L1’), standardise hyphenation of terms (‘type-approved’, ‘type-approval’, ‘direction-indicator lamp’, ‘light-emitting surface’), delete references to ‘above’ in cross-references, add space for clarifying UN Regulation No. 48 series, delete ‘to this Regulation’ after Annex references, use scientific notation for lumens, add electric vehicle inclusion provisions, correct signal lamp category errors, add Annexes 6 and 7 (summary tables of lamp positioning and geometric visibility angles), insert para. 5.22, and include transitional provisions applicable from the official date of entry into force of the 04 series of amendments, with continued acceptance of preceding series approvals until 1 September [20xx].

GRE-IWG SLR presents baseline amendments to UN R74 series 04. The document highlights main improvements including simplification of definitions in para. 2 by deleting common definitions shared with UN R48, deletion of six definitions resulting in six remaining, terminology and format alignment with UN R48 and UN R53, addition of a summary table of lamp positioning and geometric visibility angles, amendments to align with other installation regulations including failure provisions and electric vehicle inclusion, simplification of para. 6.×.4. and 6.×.5., retention of only the latest transitional provisions with previous ones moved to a reference document, and provision of editable pictures.

Progress report on the GRE-IWG SLR’s work to simplify UN Lighting Installation Regulations. The document presents baseline documents for UN R48, UN R53, UN R74, and UN R86, with editorial review and technical amendments. Stage 2/Step 2 submissions include consolidated texts and amendments highlights for each regulation, old transitional provisions, and proposals for corrections to UN R149 and UN R150. Ongoing discussions address rear direction indicator visibility, apparent surface definitions, and single lamp separation distance. The SLR package is scheduled for informal submission at GRE-95 in October 2026, final formal submission at GRE-96 in April 2027, and adoption at WP.29 in November 2027.

The agenda includes adoption of previous session reports, correction of errors in Regulation 150-01, improvement of direction indicator visibility, rearrangement of lamp provisions in Regulation 48, consistency checks for geometric visibility angles, baseline documents for Regulations 48, 53, 74, and 86, review of transitional provisions, discussion of apparent surface definitions, and submission preparation for GRE-95.

SLR will deliver Stage 2/Step 2 to GRE-96 by end of January 2027 for submission to WP.29 in November 2027. SLR’s mandate ends December 2027. A new informal working group on Supporting technical experts on Lighting Regulation (SteLR) will be established, chaired by EC and vice-chaired by Germany, to address remaining open points from SLR and TF-GP. Main topics include visibility of signalling functions, glare prevention, apparent surface, energy saving, replaceability and sustainability, and V2X communication.

Proposal to amend UN R74:

• Simplify definitions by referring to UN Regulation No. 48,
• Replace vehicle type references with vehicles of category L₁,
• Use hyphens in “type-approved” and “direction-indicator lamp”,
• Add provisions for electric vehicle inclusion,
• Consolidate general and individual lamp specifications,
• Reorganize geometric visibility requirements into paragraphs 5.5 and 5.6,
• Add para. 5.22 regarding lamp operation requirements,
• Create summary tables in Annexes 6 and 7 for lamp positioning and geometric visibility angles,
• Revise approval marks in Annex 2,
• Reserve Annex 3,
• Establish transitional provisions for the 04 series with dates to be determined (1 September [20xx]).

The 78th session of the GRE Informal Working Group on Simplification of UN Lighting and Light-Signalling Regulations was held in Brussels, 10-12 June 2026. SLR decided not to include a new Part 7 on Colour-fastness in Annex 6 to Regulation 150-01 and will submit a consolidated correction proposal to GRE-95. Discussion on apparent surface definitions and single lamp distance requirements will resume at SLR-79, with wider consideration of related topics including glare and direction indicator visibility. Baseline documents for Regulations 48, 53, 74, and 86 were reviewed and updated versions will be prepared for the next session. The next SLR meeting will be held in Tokyo on 7-11 September 2026.

At the 77th SLR meeting (Brussels, April 2026), participants reviewed and improved baseline documents for UN Regulations 48, 53, 74, and 86, reflected in SLR-77-08/Rev.1, SLR-77-09, SLR-77-10, and SLR-77-07 respectively. SLR approved a revised proposal to correct errors in Reg. 150-01 (SLR-77-06/Rev.1, superseding GRE-94-02) and a compromise text prohibiting additional lamps unless complying with national requirements. SLR agreed to postpone official document submission to GRE-96 (April 2027) and will submit 11 informal documents to GRE-94, including status report, four baseline documents, four highlights slides, a proposal on technological neutrality, and the revised correction proposal. Discussions on apparent surface, direction indicator visibility, and direction indicator lamp height will resume at SLR-78 (June 2026).

The 76th SLR session (4–6 February 2026) reviewed and improved baseline documents for Regulations 48, 53, 74, and 86 for Stage 2/Step 2 submission to GRE-94 as informal documents. SLR approved simplification of paragraphs 6.×.4. and 6.×.5. in Reg. 48 and agreed on technological neutrality amendments to Reg. 48 and a compromise text for Reg. 149. SLR approved a compromise text on “Prohibited if not allowed” for final check at SLR-77. Discussions on apparent surface and direction indicator visibility will resume at SLR-77. Transitional Provisions for the 10 series will be reviewed at SLR-77. The 77th, 78th, and 79th meetings are scheduled for April, June, and September 2026.

Annotated provisional agenda for GRE’s ninety-fifth session (20-23 October 2026). The session will address development of UN Global Technical Regulations and Rules; simplification of lighting and light-signalling UN Regulations; amendments to UN Regulations Nos. 48, 53, 74, 86, 148, 149, 150, 10 and 65; activities of informal working groups and task forces on simplification, light sources, electromagnetic compatibility, glare prevention, and autonomous vehicle signalling; International Whole Vehicle Type Approval and electronic database developments; and election of officers for 2027.

The GRE Informal Working Group on Simplification of UN Lighting and Light-Signalling Regulations held its 73rd session in Brussels on 9-11 July 2025. SLR approved reports from the 70th and 71st sessions. The Homework Team R-150 will prepare an updated version of SLR-73-09 including a decision tree and justification for submission to GRE-93 or GRE-94. SLR experts will study the GTB draft proposal in SLR-73-04 (superseded by SLR-73-04/Rev.1) to simplify paragraphs 6.×.4. and 6.×.5. in Reg. 48. SLR-73-07/Rev.1 reflects the latest baseline document for Reg. 48 with agreed modifications. IMMA introduced baseline documents for Reg. 53 and Reg. 74 reflecting simplified definitions. CEMA will prepare a baseline document for Reg. 86. GTB will prepare an updated proposal for a CAD-based method to determine apparent surface for SLR-74. A special SLR session on apparent surface may be held on 10 September 2025 if equipment is available. Discussion continues on harmonisation of requirements, improving direction indicator visibility, and technological neutrality for light sources. The 74th SLR meeting is scheduled for 10-12 September 2025 in Brussels.

The 74th SLR meeting (Brussels, 10–12 September 2025) reviewed baseline documents for Regulations 48, 53, 74, and 86, with participants improving draft texts on simplified paragraph structures and definitions. Key topics included correction of errors in Regulation 150 (formal proposal for GRE-94 April 2026), apparent surface simplification with support for Alternative A and luminance method consideration, improved visibility of daytime running lights (OICA drafting proposal for December session), and harmonisation of requirements regarding prohibited if not allowed (seeking GRE feedback). Technological neutrality for light sources was deferred to informal discussions. The 75th meeting is scheduled for 10–12 December 2025 in Brussels.

The GRE Informal Working Group on Simplification of UN Lighting and Light-Signalling Regulations held its 75th session in Brussels, 10–12 December 2025. SLR reviewed and improved revised baseline documents for Regulations 48, 53, 74, and 86, reflected in SLR-75-10/Rev.1, SLR-75-16/Rev.1, SLR-75-17, and SLR-75-21 respectively. SLR endorsed corrections to Regulation 150-01 in SLR-75-02/Rev.1 and simplified paragraphs 6.×.4. and 6.×.5. in Regulation 48 per SLR-75-05/Rev.1 (superseded by SLR-75-05/Rev.2), with continued discussion at SLR-76. SLR tasked GTB to complete work on apparent surface definition and CAD method. SLR agreed the 76th meeting will be held 4–6 February 2026 in Brussels.

Proposal to amend the definitions ; add EV inclusion; clarify individual and general provisions, failure provisions, and transitional provisions; correct signal lamp category; use category symbol instead of lamp function name;

Proposal to amend UN R74 series 04 by simplifying the definition in paragraph 2 through deletion of common definitions to UN R48, applying amendments for failure provision and EV inclusion, aligning terminology and format with UN R48 and UN R53, retaining only the latest transitional provisions, simplifying paragraphs 6.×.4 and 6.×.5, and providing editable pictures.

The agenda includes corrections to UN R150-01, baseline documents for UN R53, R74, R86, and R48, simplification of paragraphs 6.×.4 and 6.×.5, transitional provisions, harmonisation of requirements, apparent surface considerations, and direction indicator visibility improvements. The next meetings are scheduled for June and December 2026, with a potential September 2026 session in Tokyo.

Baseline document for amending UN R74 (based on WP.29/2024/91, SLR-71-07, SLR-71-7, SLR-66-01, and SLR-73-07). Key changes include: simplifying definitions; using “type-approved” and “type-approval” with hyphens per UN R48; replacing “vehicle type (moped)” with “type of vehicles of category L₁”; adding hyphenation to “direction-indicator lamp”; deleting “above” from paragraph references; clarifying UN R48 series; removing “to this Regulation” after Annex references; applying scientific notation for lumens; including electric vehicles; revising individual and general provisions; correcting signal lamp category errors; and using category symbols instead of lamp function names.