1. The Working Party on Lighting and Light-Signalling (GRE) held its ninetieth session from 29 April to 3 May 2024 in Geneva. The meeting was chaired by Mr. T. Kärkkäinen (Finland). Experts from the following countries participated in the work according to Rule 1 (a) of the Rules of Procedure of the World Forum for Harmonization of Vehicle Regulations (WP.29) (ECE/TRANS/WP.29/690/Rev.2): Australia, Canada, China, Finland, France, Germany, India, Italy, Japan, Netherlands, Norway, Poland, Republic of Korea, Spain, United Kingdom of Great Britain and Northern Ireland, United States of America. An expert from the European Commission (EC) participated. Experts from the following non‑governmental organizations also took part in the session: American Automotive Policy Council (AAPC), European Agricultural Machinery Association (CEMA), European Association of Automotive Suppliers (CLEPA), Fédération Internationale de l’Automobile (FIA), Fédération Internationale de Motocyclisme (FIM), International Automotive Lighting and Light Signalling Expert Group (GTB), International Electrotechnical Commission (IEC), International Motor Vehicle Inspection Committee (CITA), International Motorcycle Manufacturers Association (IMMA), International Organization of Motor Vehicle Manufacturers (OICA), Society of Automotive Engineers (SAE).