Ratification map
France, Germany and the European Commission have called for ratification to continue despite the Irish No, pointing to a scenario in which Ireland stands isolated against 26 EU states and faces pressure for a re-vote, as occured with the 2001 Nice treaty referendum.
Sixteen EU states have so far definitively ratified Lisbon. The Finnish, Polish and German parliaments have approved the text, but are awaiting their presidents' signatures. The Swedish, Dutch, Belgian, Italian, Spanish, and Cypriot legislatures will finish voting between July and the autumn.
The Czech Republic is not the only problem country left, with the Polish president's office questioning whether the treaty still legally exists and the German constitutional court considering a legal challenge.
Austrian leader Alfred Gusenbauer last week said he would also call a referendum if Lisbon is tweaked for a second Irish vote.