Council Decision (EU) 2023/1059 of 25 May 2023 on the position to be adopted on behalf of the European Union within the Specialised Committee on Social Security Coordination established by the Trade and Cooperation Agreement between the European Union and the European Atomic Energy Community, of the one part, and the United Kingdom of Great Britain and Northern Ireland, of the other part, as regards the designation of the financial institution to serve as reference to determine the interest rate for late payments and the exchange rate for currency conversions, as well as the date to be taken into consideration for determining the rates of currency conversion