1. The Working Party on Pollution and Energy (GRPE) held its eighty-fourth session on 12 November 2021, with André Rijnders (Netherlands) as Chair and Duncan Kay (United Kingdom of Great Britain and Northern Ireland) as Vice-Chair. Experts from the following countries participated in the work following Rule 1(a) of the Rules of Procedure of the World Forum for Harmonization of Vehicle Regulations (WP.29) (TRANS/WP.29/690, as amended): Australia, Canada, China, France, Germany, Hungary, India, Italy, Japan, Netherlands, Norway, Republic of Korea, Russian Federation, South Africa, Spain, Sweden, Switzerland, United Kingdom of Great Britain and Northern Ireland (UK), United States of America. Experts from the European Commission (EC) also participated. Experts from the following non-governmental organizations (NGOs) took part in the session: American Automotive Policy Council (AAPC), Association for Emissions Control by Catalyst (AECC), European Association for Electric Mobility (AVERE), European Association of Automobile Suppliers (CLEPA/MEMA/JAPIA), European Garage Equipment Association (EGEA), European Tyres and Rubber Manufacturers Association (ETRMA), Federation of European Manufacturers of Friction Materials (FEMFM), Fédération Internationale de l’Automobile (FIA), International Association for Natural Gas Vehicles (NGV Global), International Motorcycle Manufacturers Association (IMMA), and International Organization of Motor Vehicle Manufacturers (OICA).