Enlargement of the European Union and "morally imperative", which reflected the desire of the EU to admit these countries as members, even though they were less developed than the Western European countries. Following this Romania and Bulgaria, though were deemed initially as not fully ready by the Commission to join in 2004, acceded nevertheless on 1 January 2007. These, like the countries joining in 2004, faced a series of restrictions as to their citizens not fully enjoying working rights on the territory of some of the older EU members. Bulgaria and Romania are not yet members of the Schengen area; however, their citizens can travel
European integration on 1 January 2001. Slovenia joined on 1 January 2007, Cyprus and Malta were admitted on 1 January 2008, Slovakia joined on 1 January 2009, Estonia on 1 January 2011, Latvia on 1 January 2014 and Lithuania on 1 January 2015. Outside the EU, agreements have been concluded with Andorra, Monaco, San Marino, and Vatican City for formal adoption, including the right to issue their own coins. Montenegro and Kosovo unilaterally adopted the euro when it launched. There has long been speculation about the possibility of the European Union eventually becoming a fiscal union. In the wake of the European