Central and Eastern Europe Soviet Union; the independent states in former Yugoslavia (which were not considered part of the Eastern bloc); and the three Baltic states – Estonia, Latvia, Lithuania (which chose not to join the CIS with the other 12 former republics of the USSR). The CEE countries are further subdivided by their accession status to the European Union (EU): the eight first-wave accession countries that joined the EU on 1 May 2004 (Estonia, Latvia, Lithuania, Czech Republic, Slovakia, Poland, Hungary, and Slovenia), the two second-wave accession countries that joined on 1 January 2007 (Romania and Bulgaria) and the third-wave accession country that
Glossary of European Union concepts, acronyms, & jargon of Accession 2003 was the agreement between the European Union and the ten countries (Czech Republic, Estonia, Cyprus, Latvia, Lithuania, Hungary, Malta, Poland, Slovenia, Slovakia), concerning their accession into the EU. It was signed on 16 April 2003 and they became full member states on 1 May 2004 following the ratification procedures. The Treaty of Accession 2005 was the agreement between the European Union and two countries (Bulgaria and Romania) concerning their accession to the EU. It was signed on 25 April 2005 and they became full member states on 1 January 2007 following the ratification procedures. The Treaty of