Nicetraktaten blev undertegnet i Nice den 26. februar af EU-medlemsstaternes befuldmægtigede under en officiel ceremoni med taler af Jacques Chirac, Den Franske Republiks præsident, Lionel Jospin, Frankrigs premierminister, Göran Persson, Sveriges statsminister og formand for Det Europæiske Råd, Nicole Fontaine, formand for Europa-Parlamentet, og Romano Prodi, formand for Kommissionen.
The Treaty of Nice was signed in Nice on 26 February by the plenipotentiaries of the European Union's Member States during an official ceremony where the speakers included Mr Chirac, President of the French Republic, Mr Jospin, Prime Minister of France, Mr Persson, Prime Minister of Sweden and President of the European Council, Mrs Fontaine, President of the Euro pean Parliament, and Mr Prodi, President of the Commission.