1. The World Forum for Harmonization of Vehicle Regulations (WP.29) held its 171st session from 14 to 17 March 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): Australia; Austria; Belgium, Bosnia and Herzegovina; Brazil; Canada; China; Croatia; Czech Republic; France; Germany; Hungary; India; Italy; Japan; Latvia, Luxembourg; Malaysia; Netherlands; Norway, Pakistan; Poland; Portugal; Republic of Korea; Romania; Russian Federation; Slovakia; Singapore; South Africa; Spain; Sweden; Switzerland; Turkey; United Kingdom of Great Britain and Northern Ireland and United States of America. Representatives of the European Union (EU) participated. The following governmental organizations were represented: World Health Organization (WHO), International Telecommunication Union (ITU) and Eurasian Economic Commission (EEC).The following non-governmental organizations were also represented: Association for Emissions Control by Catalyst (AECC); Consumers International (CI); European Association of Automotive Suppliers (CLEPA, also representing MEMA and JAPIA); European Tyre and Rim Technical Organisation (ETRTO); Foundation for the Automobile and Society (FIA Foundation); Global New Car Assessment Programme (Global NCAP); International Automotive Lighting and Light Signalling Expert Group (GTB); International Electrotechnical Commission (IEC); International Motorcycle Manufacturers Association (IMMA); International Motor Vehicle Inspection Committee (CITA) and the International Organization of Motor Vehicle Manufacturers (OICA).