The European Central Bank published the October 2025 list of members of the Rulebook Development Group, setting out its chair and secretary and the stakeholder organisations represented from the European retail payments market, the Eurosystem and EU institutions as observers. Patrick Papsdorf serves as Chairperson and Sjoerd van der Vaart as Secretary. Market representatives include trade bodies and stakeholder groups spanning credit institutions (ESBG, EBF, EACB), payment institutions (EPIF), third-party providers (ETPPA), the European Payment Council, electronic money institutions, acquirers (EDPIA), consumers (BEUC), SMEs (SMEunited), corporate treasurers (VDT, with the representative coordinating to provide a European view), and merchants (Ecommerce Europe and Eurocommerce). Eurosystem representation includes staff from Deutsche Bundesbank, Central Bank of Ireland, Banco de EspaƱa, Banque de France, Suomen Pankki, Banca d'Italia, De Nederlandsche Bank, Oesterreichische Nationalbank, Banco de Portugal and the European Central Bank, with observing members from the European Commission, European Parliament and the Danish Presidency of the Council of the EU.