European Union and West Germany signed the Treaty of Rome, which created the European Economic Community (EEC) and established a customs union. They also signed another pact creating the European Atomic Energy Community (Euratom) for co-operation in developing nuclear energy. Both treaties came into force in 1958. The EEC and Euratom were created separately from the ECSC, although they shared the same courts and the Common Assembly. The EEC was headed by Walter Hallstein (Hallstein Commission) and Euratom was headed by Louis Armand (Armand Commission) and then Étienne Hirsch. Euratom was to integrate sectors in nuclear energy while the EEC would develop
European Economic Area idea of the EEC enlarging with more member states, as he feared that it would impede the ability of the Community to complete the internal market reform and establish the monetary union. Delors proposed a European Economic Space (EES) in January 1989, which was later renamed the European Economic Area, as it is known today. By the time the EEA was established, however, several developments hampered its credibility. First of all, Switzerland rejected the EEA agreement in a national referendum on 6 December 1992 obstructing full EU-EFTA integration within the EEA. Furthermore, Austria had applied for full EEC membership in