1. The World Forum for Harmonization of Vehicle Regulations (WP.29) held its 173rd session from 14 to 17 November 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): Algeria, Australia, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Canada, China, Czech Republic, Finland, France, Germany, Hungary, India, Israel, Italy, Japan, Jordan, Latvia, Lebanon, Luxembourg, Malaysia, Morocco, Netherlands, Norway, Philippines, Poland, Portugal, Republic of Korea, Romania, Russian Federation, San Marino, Serbia, South Africa, Spain, Sweden, Switzerland, Tunisia, Turkey, Uruguay, United Kingdom of Great Britain and Northern Ireland and United States of America. Representatives of the European Union (EU) participated. The State of Palestine was represented as Observer. The following governmental organizations were represented: International Telecommunication Union (ITU). The following intergovernmental organizations were represented: The European Union funded EuroMed Transport Support Project and the 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/MEMA/JAPIA)1; European Tyre and Rim Technical Organization (ETRTO); Consumers International (CI); 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); Society of Automotive Engineers (SAE) International; Other non-governmental organizations, private sector entities, independent experts and observers that were represented were: All Rights For All (ARFA-Pakistan); the American Automotive Policy Council (AAPC); Automobile and Motorcycle Association of Serbia Centre for Motor-Vehicles (AMSS-CMV) Ltd.; Confederation of the European Bicycle Industry (CONEBI); Fédération Internationale de l’Automobile (FIA); McLaren Applied Technologies; the Recreation Vehicle Industry Association (RVIA); “SEG” Civil Society Support Center NGO and Transport Systems Catapult.