Generalitat of Catalonia

• Josep-Lluís Carod Rovira, Vice-president of the Government of Catalonia.
• Alberto Navarro, Secretary of State for the European Union, Government of Spain
• Manuel Lobo Antunes, Secretary of State for European Affairs, on behalf of the Portuguese Presidency of the European Union
• Anna Terrón i Cusí, Secretary for the European Union of the Government of Catalonia and Secretary General of REGLEG
• Diane Verstraeten, Secretary General, Flemish Ministry of Foreign Affairs
• Andrew Davies, Minister of Finance and Public Service Delivery, Welsh Government
• Jean-Claude Van Cauwenberghe, Vice-president of the Interregional Group of Regions with Legislative Powers in the Committee of the Regions
• José Montilla i Aguilera, President of the Government of Catalonia
• Michel Delebarre, President of the Committee of the Regions

• Catalonia

• Vienna
• Lower Austria
• Salzburg
• Carinthia

• Wallonia
• Flanders
• Brussels-Capital

• Åland Islands

• Saxony-Anhalt
• Bavaria
• Saxony
• North Rhine-Westphalia
• Baden-Württemberg

• Piedmont
• Sicily
• Tuscany
• Friuli-Julian March
• Aosta Valley

• Madeira

• Asturias
• Balearic Islands
• Andalusia
• Extremadura
• Basque Country
• Aragón
• Galicia
• Canary Islands
• Cantabria

• Wales
• Scotland
• Northern Ireland