Treaties of the European Union the Functioning of the European Union (originally signed in Rome in 1957 as the Treaty establishing the European Economic Community, aka The Treaty of Rome), lay out how the EU operates, and there are a number of satellite treaties which are interconnected with them. The treaties have been repeatedly amended by other treaties over the 65 years since they were first signed. The consolidated version of the two core treaties is regularly published by the European Commission. The two principal treaties on which the EU is based are the Treaty on European Union (TEU; Maastricht Treaty, effective since 1993) and
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