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
Special member state territories and the European Union and Territories Association. The Outermost Regions were recognised at the signing of the Maastricht Treaty in 1992 and confirmed by the Treaty of Lisbon in 2007. The Treaty on the Functioning of the European Union states that both primary and secondary European Union law applies automatically to the outermost regions, with possible derogations due to the particularities of these territories. The Overseas Countries and Territories are recognised by the Article 198 of the Treaty on the Functioning of the European Union which allows them to opt into EU provisions on the freedom of movement for workers and freedom of establishment,