Institutional seats of the European Union are based in Luxembourg City along with the European Investment Bank. The Economic and Social Committee and the Committee of the Regions are entirely based in Brussels while the European Central Bank is based in Frankfurt and Europol is the only agency to have its seat fixed by the treaties, in The Hague. Separately, the Treaty of Nice establishes Brussels as the venue for all formal summits of the European Council after 2004. However some extraordinary sessions are sometimes held outside the city. The European Council's seat is however fixed by a declaration rather than a protocol, meaning it is
European Central Bank transparency obligations in contrast to EU Institutions standards and other major central banks. Indeed, as pointed out by Transparency International, "The Treaties establish transparency and openness as principles of the EU and its institutions. They do, however, grant the ECB a partial exemption from these principles. According to Art. 15(3) TFEU, the ECB is bound by the EU’s transparency principles “only when exercising [its] administrative tasks” (the exemption – which leaves the term “administrative tasks” undefined – equally applies to the Court of Justice of the European Union and to the European Investment Bank)." In practice, there are several concrete