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.

Simplification work on UN Regulation No. 86 addresses five pending points: the number of additional direction-indicator lamps allowed, geometric visibility of category 6 direction-indicator lamps, height for slow-moving vehicles marking plates set as low as possible above the ground but not less than 250 mm at the lower edge, position for slow-moving vehicles marking plates with regard to the vehicle median longitudinal plane, and speed for automatic activation of manoeuvring lamps proposed at 15 km/h as a compromise.

Proposal to:

• Modify para. 1 of Scope to include vehicles of categories S, agricultural and forestry NRMM, and category T vehicles,
• Amend para. 2 to restructure definitions for vehicle type, lamps, dimensions, and retro-reflectors,
• Delete redundant definitions,
• Add general provisions for lamp position and geometric visibility,
• Modify para. 3 regarding type-approval documentation,
• Amend para. 4 to reference Schedule 4 of the 1958 Agreement (E/ECE/TRANS/505/Rev.3),
• Reorganise para. 5 to establish general specifications and consolidated provisions for lighting connections, tell-tales, concealable lamps, lamps of variable position, and provisions regarding light confusion,
• Amend para. 6 to revise individual specifications for all lamp functions with revised formatting, measurements, and geometric visibility angles, including new requirements for driving-beam and passing-beam headlamps, front fog lamps, reversing lamps, direction-indicator lamps with arrangements A through E, hazard warning signals, stop lamps, front and rear position lamps, rear fog lamps, parking lamps, end-outline marker lamps, work lamps, retro-reflectors (front and rear, triangular and non-triangular), side-marker lamps, daytime running lamps, cornering lamps, conspicuity markings, rear registration plate illuminating lamps, manoeuvring lamps, SMV rear marking plates, exterior courtesy lamps, and signalling panels or signalling foils,
• Modify paras. 7 to 10 regarding modification, extension, conformity, penalties, and discontinuation of production,
• Amend para. 11 regarding technical services and type-approval authorities,
• Restructure para. 12 with transitional provisions for the 04 series of amendments with mandatory application dates of 1 September 20xx,
• Revise Annex 1 communication form to reference the 04 series of amendments and update lamp designations,
• Revise Annex 2 to reflect 04 series of amendments in approval mark examples,
• Replace Annex 3 with new Annex 3 containing visibility zones for red and white light (para. 5.11.4),
• Replace Annex 4 (Direction-indicator lamps geometry) with new Annex 4 containing informative summary tables for lighting and light-signalling installation rules for vehicles of categories T, R, and S,
• Replace Annex 5 (replacing former Annex 6) with updated specifications for signalling panels and signalling foils, applicable from 1 September 20xx.

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.

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, restructure, and clarify UN R86:

• Update the regulation title and scope to reference vehicles of category T, R, S, agricultural and forestry NRMM vehicles regarding installation of lighting and light-signalling devices
• Restructure and reorganize para. 2 (Definitions) by consolidating lamp definitions, deleting outdated definitions, and reorganizing vehicle-related and lamp-related definitions into separate sections
• Revise para. 3 (Application for approval) to clarify submission requirements and add reference to Annex 1 documentation
• Amend para. 4 (Approval) to reference Schedule 4 of the 1958 Agreement and update approval mark procedures in Annex 2
• Restructure para. 5 (General specifications) by reorganizing and renumbering provisions relating to lamp position (para. 5.5.), geometric visibility (para. 5.6.), single lamps (para. 5.9.2.), tell-tale requirements (para. 5.14.), concealable lamps (para. 5.15.), and lamps of variable position (para. 5.17.), and revise provisions regarding electrical connections for front and rear position lamps, driving-beam and passing-beam headlamps, and daytime running lamps
• Restructure and revise para. 6 (Individual specifications) by introducing para. 6.0. as a general introductory provision, renaming driving-beam and passing-beam headlamps throughout, reorganizing direction-indicator lamp arrangements as A, B, C, D, E with detailed geometric visibility specifications in para. 6.5.5., revising stop lamp position and geometric visibility requirements in para. 6.7., restructuring front and rear position lamp requirements, revising rear fog lamp electrical connections, clarifying parking lamp requirements, restructuring rear and front retro-reflector specifications to include separate sections on electrical connections, tell-tale, and other requirements, reorganizing side-marker lamp provisions, clarifying conspicuity marking requirements, revising SMV rear marking plate specifications, restructuring exterior courtesy lamp and manoeuvring lamp requirements, and updating all light colour specifications
• Amend para. 8 (Conformity of production) to include reference to the Agreement Schedule 1 and clarify the conformity requirements
• Clarify para. 10 (Production definitively discontinued) regarding notification requirements
• Revise para. 12 (Transitional provisions) to replace existing series-specific provisions with general transitional provisions applicable to all series of amendments and add new transitional provisions for the 04 series of amendments with dates specified as 1 September 20xx (pending confirmation)
• Update Annex 1 (Communication) to reference the 04 series of amendments in the approval mark examples and add informative tables (TableA4-1 and TableA4-2) in Annex 4 (previously Annex 3) summarizing lighting and light-signalling installation rules for tractors/agricultural and forestry NRMM (vehicles of category T) and vehicles of categories R and S
• Revise Annex 2 (Examples of arrangements of approval marks) to reference the 04 series of amendments and update marking examples
• Delete Annex 3 (The relevant parts of Annex 3 to UN Regulation No. 48 apply) and replace with visibility zones diagrams in new Annex 3
• Reorganize former Annex 5 (Direction-indicator lamps – Geometric visibility) and incorporate into new Annex 4 as summary tables with footnotes explaining special conditions
• Update Annex 5 (Signalling panels and signalling foils) to clarify dimensions, arrangement, number and reflecting surface requirements with references to updated figures and table

Proposal applies to vehicles of categories T, R, and S and agricultural NRMM regarding lighting and light-signalling device installation. The regulation establishes approval procedures, general specifications for lamp fitting and adjustment, electrical connections, and individual specifications for various lighting functions including driving-beam and passing-beam headlamps, direction-indicator lamps, stop lamps, position lamps, retro-reflectors, and other light-signalling devices. It specifies position requirements (height, width, length), geometric visibility angles, colour requirements, and electrical interconnection rules. Transitional provisions address implementation across different amendment series, with staggered acceptance periods for type-approvals granted under preceding series of amendments.

UN R86 baseline amendments add agricultural non-road mobile machinery to scope. Definitions are simplified by removing common vehicle definitions and aligning structure with UN R48. Headlamps symmetrical classes are reviewed following CLEPA comment. Side retro-reflector requirements align with EU requirements on location. Direction-indicator lamps alignment with EU scope for tractors remains an open point.

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.