1. The Working Party on Lighting and Light-Signalling (GRE) held its seventy-third session from 14 to 17 April 2015 in Geneva, under the chairmanship of Mr. M. Loccufier (Belgium). 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) (TRANS/WP.29/690, Amends. 1 and 2): Austria; Belgium; Canada; China; Czech Republic; Finland; France; Germany; Hungary; India; Italy; Japan; Luxemburg; Netherlands; Norway; Poland; Republic of Korea; Russian Federation; Spain; Sweden and the United Kingdom of Great Britain and Northern Ireland (UK). An expert from the European Commission (EC) participated. Experts from the following non‑governmental organizations also took part in the session: European Association of Automotive Suppliers (CLEPA); International Automotive Lighting and Light Signalling Expert Group (GTB); International Electrotechnical Commission (IEC); International Motorcycle Manufacturers Association (IMMA); International Organization of Motor Vehicle Manufacturers (OICA) and Vehicle Lighting Association. Upon invitation of the Chair, the experts from the European Committee of Associations of Manufacturers of Agricultural Machinery (CEMA) participated.