1. The World Forum for Harmonization of Vehicle Regulations (WP.29) held its 172nd session from 20 to 23 June 2017, chaired by Mr. A. Erario (Italy). The following countries were represented, following Rule 1(a) of the Rules of Procedure of WP.29 (TRANS/WP.29/690 and ECE/TRANS/WP.29/690/Amend.1 and Amend.2): Austria; Belgium, Bosnia and Herzegovina; Brazil; Cambodia; Canada; China; Czech Republic; Finland France; Germany; Hungary; India; Israel; Italy; Japan; Kazakhstan; Latvia, Luxembourg; Malaysia; Netherlands; Norway; Poland; Portugal; Republic of Korea; Romania; Russian Federation; San Marino; Slovakia; South Africa; Spain; Sweden; Switzerland; Thailand; United Kingdom of Great Britain and Northern Ireland; United States of America and Viet Nam. Representatives of the European Union (EU) participated. The following governmental organizations were represented: International Telecommunication Union (ITU). The following intergovernmental organizations were represented: Eurasian Economic Commission (EEC). The following non-governmental organizations were also represented: Association for Emissions Control by Catalyst (AECC); European Association of Automotive Suppliers (CLEPA, representing also the Motor and Equipment Manufacturers Association (MEMA) and Japan Auto Parts Industries Association (JAPIA)); European Tyre and Rim Technical Organisation (ETRTO); Foundation for the Automobile and Society (FIA Foundation); Global New Car Assessment Programme (Global NCAP); the International Automotive Lighting and Light Signalling Expert Group (GTB); International Electrotechnical Commission (IEC); International Motorcycle Manufacturers Association (IMMA); International Motor Vehicle Inspection Committee (CITA); the International Organization for Standardization (ISO); and the International Organization of Motor Vehicle Manufacturers (OICA). Other non-governmental organizations and observers that were represented were: the Recreation Vehicle Industry Association (RVIA) and the American Automotive Policy Council (AAPC).