Proposal to amend para. 3.1. and 3.2. of Annex 5 to harmonize terminology by replacing ‘light emitting surface’ with ‘illuminating surface’, amend para. 7.3. of Annex 5 to specify minimum and maximum dimensions for the fluorescent or retro-reflective triangle and red retro-reflective border, amend para. 1.1. of Part 1 of Annex 7 to clarify the wording of visual inspection requirements for retroreflectors following chemical testing, and delete Annex 11 containing guidelines for installation of rear marking plates on slow-moving vehicles.

Proposal to amend the Introduction to clarify requirements for approval markings and the Unique Identifier conditional upon access to a secure internet database, amend para. 3.3.1.1. to specify space for the Unique Identifier or approval marking, amend para. 3.3.1.3. to reference Table 1 and Annex 10 for marking arrangements, add new para. 3.3.2.5. for a vertical arrow on devices with reduced light distribution, delete para. 3.3.3. regarding the Unique Identifier format, renumber para. 3.3.4. as para. 3.3.3., amend paras. 3.3.5. and 3.3.6. to clarify marking location and grouped lamps, amend para. 3.5.3.1. to verify stability of optical properties and colour, amend para. 5.1. to list retro-reflector classes, amend paras. 5.1.2., 5.1.3.1., and related provisions to adjust sample numbers and test procedures following exclusion of colour-fastness testing, amend para. 5.2.3.3. to reference the correct heat resistance test part, amend paras. 5.2.5.1.1. and 5.2.6.3. and add Table 8 for daytime colour specifications, delete para. 5.2.5.2.1. regarding maximum retro-reflection values for Classes D and E, renumber Tables 8, 9, and 10 as Tables 9, 10, and 11 respectively, amend Annex 1 Item 5. and add provision for Unique Identifier position, amend Annex 5 para. 8.1.4. to correct cross-reference, amend Annex 6 Parts 2 and 4 provisions for coefficient measurement and corrosion test references, and amend Figure A10-I to remove diametrically opposite requirement for class symbols.

Guidelines establishing requirements for installation, arrangement, position and geometric visibility of rear marking plates on slow-moving vehicles and their trailers which, by construction, cannot travel faster than 30 km/h. At least one rear marking plate shall be type approved and meet regulation requirements, with apex directed upwards and positioned at the rear of the vehicle between 250 mm and 1,500 mm above ground. The plate must lie within 5° of a transverse vertical plane perpendicular to the vehicle’s longitudinal axis and face rearwards, with horizontal visibility of 30° inwards and outwards and vertical visibility of 15° above and below horizontal.

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.

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).

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 for supplement to the 01 series of amendments to UN Regulation No. 150, amends SLR-78-07/Rev.1. Proposal to reduce the number of samples required for approval from ten to eight, delete references to colour-fastness testing and weathering resistance testing from paragraph 3.5.3.1., amend paragraphs 5.1.2., 5.1.3.1., and 5.1.7. to reflect the reduced sample requirement and revised test protocol, replace “light emitting surface” with “illuminating surface” in Annex 5, amend Annex 7 paragraph 1.1. to replace “apparent” with “noticeable” when describing surface changes, delete columns i and j and associated test rows from Tables 4 and 5, and delete Annex 11 Guidelines for installation of rear marking plates on slow-moving vehicles.

Proposal to amend approval marking and Unique Identifier requirements:

• Clarify conditional requirements for approval markings and Unique Identifier usage in the Introduction,
• Delete paragraph 3.3.3. on Unique Identifier provisions,
• Renumber paragraphs 3.3.4. through 3.3.6. as 3.3.3. through 3.3.5.,
• Amend paragraphs 3.3.1.1., 3.3.1.3., 3.3.5. and sub-paragraphs, and 3.3.6. and sub-paragraphs to remove references to Unique Identifier and reorganize marking requirements,
• Add new paragraph 3.3.2.5. requiring a downward arrow for devices with reduced light distribution,
• Amend paragraph 5.1. to expand class specifications from IA and IB to IA, IB, IIIA, IIIB and IVA,
• Restructure paragraph 5.1.3.1. testing procedures with new sub-paragraph 5.1.3.1.1. for Classes IA, IB, IIIA and IIIB and new paragraph 5.1.3.1.2. for Class IVA specifying distinct sample groupings,
• Amend paragraph 5.1.7. to create separate Tables 4 and 5 for chronological test orders for Classes IA, IB, IIIA, IIIB and Class IVA respectively,
• Amend paragraphs 5.2.3.3., 5.2.5.1.1., 5.2.5.2.1., 5.2.6.3., 5.2.6.4., and 5.3.4.2.,
• Insert new Table 8 with chromaticity coordinates and luminance factor requirements for Classes 1, 2, 3 and 4,
• Renumber existing Tables 8, 9 and 10 as Tables 9, 10 and 11,
• Amend paragraph 5.3.5.2.2.,
• Delete paragraph 5.2.5.2.1.,
• Amend Annex 1 Item 5. and para. 10 to remove Unique Identifier references,
• Amend Annex 5 paragraph 8.1.4.,
• Amend Annex 6 Part 2 paragraphs 1.3.2. and 2.1.3. and Part 4 paragraph 4.2.,
• Amend Figure A10-1 in Annex 10 to clarify marking arrangement requirements and remove diametrically opposite placement requirement for class symbols.

Proposal to amend para. 3.5.3.1. to delete reference to colour verification of retro-reflecting optical units, amend para. 5.1.2. to reduce required samples from ten to eight, amend para. 5.1.3.1. to reduce samples from ten to eight and divide remaining six samples into three groups of two, insert para. 5.1.3.1.1. specifying Classes IA, IB, IIIA and IIIB, amend para. 5.1.7. to delete sample columns i and j from Tables 4 and 5 and delete the weathering resistance test row, and amend reference to Part 4 of Annex 6 to Part 5 of Annex 6 in both tables.

Proposal to amend UN R86 on approval markings and testing requirements:

• Delete provisions regarding the Unique Identifier and conditional use of conventional type approval markings from the Introduction
• Amend para. 3.3.1.1. to delete reference to the Unique Identifier
• Amend para. 3.3.1.3. regarding approval marking proportions
• Add new para. 3.3.2.5. requiring a vertical downward arrow for devices with reduced light distribution
• Delete para. 3.3.3. on Unique Identifier entirely
• Renumber para. 3.3.4. as 3.3.3.
• Renumber para. 3.3.5. as 3.3.4. and amend to delete reference to Unique Identifier
• Renumber para. 3.3.6. as 3.3.5. and amend to delete reference to Unique Identifier
• Amend para. 5.1. to include Classes IIIA, IIIB and IVA
• Amend para. 5.1.3.1. regarding heat resistance testing and divide samples into groups for testing Class IA, Class IB, Class IIIA and Class IIIB
• Add new para. 5.1.3.1.2. for Class IVA testing
• Amend para. 5.1.7. to create separate Tables 4 and 5 for chronological order of tests for Classes IA, IB, IIIA, IIIB and Class IVA respectively
• Amend para. 5.2.3.3. to reference Part 1 of Annex 6 and paragraphs 5.2.5. and 5.2.6.
• Amend para. 5.2.5.1.1. regarding coefficient of retro-reflection measurement
• Delete para. 5.2.5.2.1. entirely
• Amend para. 5.2.6.3. to include colour requirements and insert Table 8
• Amend para. 5.2.6.4. regarding luminance factor
• Renumber Tables 8, 9 and 10 as Tables 9, 10 and 11
• Amend para. 5.3.5.2.2. to reference Table 11
• Amend Annex 1 Item 5. and delete reference to Unique Identifier in Item 10
• Amend Annex 5 para. 8.1.4. to correct cross-reference to para. 5.3.4.2.1.
• Amend Annex 6 Part 2 para. 1.3.2. to reference para. 5.2.5.1.
• Amend Annex 6 Part 2 para. 2.1.3. to correct paragraph references
• Amend Annex 6 Part 4 para. 4.2. to reference Table 6 only
• Insert new Part 7 in Annex 6 on colour-fastness for Classes IA, IB, IIIA, IIIB and IVA
• Amend Figure A10-I to clarify marking arrangement rules and delete the diametrically opposite requirement

Amend para. 5.1.2. to change the number of samples from ten to eight, modify para. 5.1.3.1. to reduce samples from ten to eight and divide the other six samples into three groups instead of four by deleting the fourth group colour-fastness test requirement, add para. 5.1.7. specifying the chronological order of tests in tables for Classes IA, IB, IIIA, IIIB and Class IVA, and amend para. 3.5.3.1. to add provisions for verification of stability in time of optical properties and colour of retro-reflecting optical units of advance warning triangles in use and withdrawal of approval for systematic deficiencies.

Proposal to amend paragraph 5.2.3.3 to clarify that samples shall be subjected to the heat resistance test described in Part 1 of Annex 6, prior to the tests described in Parts 1 and 2 of Annex 6 paragraphs 5.2.5 and 5.2.6. Proposal to amend paragraph 5.1.7 to correct the reference in Tables 4 and 5 from Part 4 to Part 5 of Annex 6 for the Rear face test. Proposal to amend Annex 5, paragraph 8.1.4 to correct the cross-reference from paragraph 5.9.4.2.1 to paragraph 5.3.4.2.1.