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
Yugoslavia and the European Economic Community refused the proposal. In June 1991 an EEC mission formed by the foreign ministers of Luxembourg, Italy and the Netherlands visited Belgrade, where they talked with Yugoslav Prime Minister Ante Marković, as well as Zagreb, where they talked with Presidents Milan Kučan of Slovenia and Franjo Tuđman of Croatia. The mission members stated that almost $1 billion in economic aid would be suspended if Yugoslav military offensive continued as well as that the EEC favors the preservation of Yugoslavia as a single entity. Members of the EEC were divided over the importance they should give to the potentially contradictory principles