1. The Working Party on Noise and Tyres (GRBP) held its seventy-seventh session from 7 to 10 February 2023 in Geneva. The meeting was chaired by Mr. S. Ficheux (France). 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/Rev.2): China, Czechia, Finland, France, Germany, Hungary, India, Italy, Japan, Netherlands, Norway, Republic of Korea, San Marino, South Africa, Spain, Sweden, Switzerland and United Kingdom of Great Britain and Northern Ireland. Experts from the European Union participated. Experts from the following non-governmental organizations also participated: Bureau International Permanent des Associations de Vendeurs et Rechapeurs de pneumatiques (BIPAVER), European Association of Automotive Suppliers (CLEPA), European Garage Equipment Association (EGEA), European Tyre and Rim Technical Organization (ETRTO), Imported Tyre Manufacturers Association (ITMA), International Motorcycle Manufacturers Association (IMMA), International Organization for Standardization (ISO) and International Organization of Motor Vehicle Manufacturers (OICA).