Brussels and the European Union a provisional seat, though with the Common Assembly in Strasbourg as that was the only city with a large enough hemicycle (the one used by the Council of Europe). This agreement was temporary, and plans were set to relocate the institutions to Saarbrücken which would serve as a "European District", but this did not occur. The 1957 Treaties of Rome established two new communities, the European Economic Community (EEC) and the European Atomic Energy Community (Euratom). These shared the Assembly and Court of the ECSC but created two new sets of Councils and Commissions (equivalent to the ECSC's High Authority).
Convention on the association of the Netherlands Antilles with the European Economic Community September, 19 October, and 22 October, respectively. An Intergovernmental Conference was convened on 13 November, which signed the Convention. The actual Convention consists of four articles, the first of which establishes that the Netherlands Antilles shall be added to the (now ). Article 2 adds another protocol to the EEC Treaty, named . Article 3 concerns the ratification and article 4 the authentic versions of the text. The treaty entered into force on 1 October 1964, the first day of the month following the date of deposit of the last instrument of ratification by a signatory state, in this case