The Treaty of Nice, signed on 26 February 2001, entered into force on 1 February 2003. It dealt mostly with reforming the institutions so that the Union could function efficiently after its enlargement to 25 Member States. The Treaty of Nice, the former Treaty of the EU and the Treaty of the EC have been merged into one consolidated version.
Sõlmiti 26.2.2001. Jõustus 1.2.2003.
Eesmärk: institutsioonide reformimine, et Euroopa Liit saaks toimida tõhusalt 25 liikmesriigiga.