Czech President Vaclav Klaus (C-R) greets people as he leaves a demonstration against the Lisbon Treaty on October 3, 2009 in front of Prague Castle. Ireland's endorsement today is not the end of the road for the EU's Lisbon Treaty, with European leaders immediately turning their attention to the Czech Republic and its eurosceptic president. The reforming treaty must be formally ratified by all 27 EU nations before it can come into force. While the Irish were the only ones to put the matter to a plebiscite, the Czech Republic and Poland are yet to formally back the text which is aimed at streamlining the institutions of the expanded EU. The Czech parliament has already approved the Lisbon Treaty, which will create new posts of EU president and foreign policy supremo, as well as cutting the number of national vetoes available on European lawmaking. Klaus has said he will not sign off on the text until his nation's Constitutional Court has pronounced on its validity.