Working Party on Lighting and Light-signalling Equipment (cf French: Groupe de Rapporteurs sur l’Eclairage)
IEC
International Electrotechnical Commission
IWG
Informal Working Group: A group of experts authorized to develop proposals for consideration by WP.29 without being bound by formal UN rules of procedure.
OICA
International Organization of Vehicle Manufacturers (cf, French Organisation Internationale des Constructeurs d’Automobiles)