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
European Union and the United Nations within the UN. On 11 October 1974, the UN General Assembly granted observer status to the European Economic Community (EEC) represented by the European Commission representation in New York City. It was the first non-state entity to be granted observer status and gave it participation rights, particularly in the Economic and Social Council: the EEC operated a common commercial policy from very early on and in such matters the European Commission represented the EU, in others the Council presidency did. Despite being an observer, the EU joined several treaties and gained full participation in a number of UN bodies (see