Negotiations have been ongoing for years to reunite the island but had not seen substantial success as in the past all plans have failed to progress. A United Nations plan, announced on 31 March 2004 following talks in Switzerland, was put to both sides in separate referenda on 24 April 2004.
On the referendum, the proposed plan was favoured by the Turkish Cypriots by a majority of 2 to 1, but was overwhelmingly rejected by the Greek Cypriots by a 3 to 1 margin (see the Annan Plan for reasons). As a result, while officially the whole of Cyprus entered the European Union on 1 May 2004, the de facto EU border runs along the Green Line that separates the Greek and Turkish Cypriot parts. EU law is currently not applied in the Turkish controlled North, where the self declared Turkish Republic of Northern Cyprus is recognized only by Turkey.