The Working Party on Lighting and Light-Signalling (GRE) prepares regulatory proposals on light-related vehicle safety systems for consideration by the World Forum/WP.29. The GRE enables more than 70 government, industry, and other interested experts to cooperate in the development of regulatory requirements through joint research and validation of test procedures.

GRE works especially closely with the International Automotive Lighting and Light-signalling Expert Group (more commonly known as the GTB), a global group of vehicle manufacturers, system suppliers, light source manufacturers, testing laboratories and academia working to assure the effective regulation and safety of automotive lighting systems and their installation.

GRE usually convenes in March and October of each year.

GRE Scope
Latest Documents
12 Feb 2024 GRE: Annotated provisional agenda for the 90th (April 2024) session GRE/2024/1
13 Feb 2024 Proposal for a Supplement to the 03 series of amendments to UN R74 and to the 01 series of amendments to the UN R148 GRE/2024/9
13 Feb 2024 UN R86: Proposal for the 03 series of amendments GRE/2024/10
13 Feb 2024 UN R48: Proposal for a Supplement GRE/2023/9/Rev.2