<Tr> <Td_colspan="2"> Commission v Portugal (2010) C - 171 / 08 </Td> </Tr> <Tr> <Td_colspan="2"> TFEU arts 119, 282 - 284 </Td> </Tr> <Tr> <Td_colspan="2"> See EU law </Td> </Tr> <P> The final stage of completely free movement of capital was thought to require a single currency and monetary policy, eliminating the transaction costs and fluctuations of currency exchange . Following a Report of the Delors Commission in 1988, the Treaty of Maastricht made economic and monetary union an objective, first by completing the internal market, second by creating a European System of Central Banks to coordinate common monetary policy, and third by locking exchange rates and introducing a single currency, the euro . Today, 19 member states have adopted the euro, while 9 member states have either determined to opt - out or their accession has been delayed, particularly since the Eurozone crisis . According to TFEU articles 119 and 127, the objective of the European Central Bank and other central banks ought to be price stability . This has been criticised for apparently being superior to the objective of full employment in the Treaty on European Union article 3 . </P>

In what areas of law can the european union legislate in and where are these areas listed