<Li> negotiates international agreements </Li> <Li> based in Brussels </Li> <Table> <Tr> <Td> </Td> <Td> Court of Justice of the European Union <P> - Judiciary - </P> </Td> <Td> </Td> <Td> European Central Bank <P> - Central bank - </P> </Td> <Td> </Td> <Td> European Court of Auditors <P> - Financial auditor - </P> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> <Ul> <Li> ensures the uniform application and interpretation of European law </Li> <Li> has the power to decide legal disputes between member states, the institutions, businesses and individuals </Li> <Li> based in Luxembourg </Li> </Ul> </Td> <Td> <Ul> <Li> forms together with the national central banks the European System of Central Banks and thereby determines the monetary policy of the eurozone </Li> <Li> ensures price stability in the eurozone by controlling the money supply </Li> <Li> based in Frankfurt </Li> </Ul> </Td> <Td> <Ul> <Li> checks the proper implementation of the budget </Li> <Li> based in Luxembourg </Li> </Ul> </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> Court of Justice of the European Union <P> - Judiciary - </P> </Td> <Td> </Td> <Td> European Central Bank <P> - Central bank - </P> </Td> <Td> </Td> <Td> European Court of Auditors <P> - Financial auditor - </P> </Td> <Td> </Td> </Tr>

When did ireland become a member of the eu