Nice Treaty

The Nice Treaty, formally known as the Treaty of Nice, is an agreement signed in 2001 that aimed to reform the institutional structure of the European Union (EU) to prepare for the EU's expansion. It adjusted the voting system in the Council of the EU, modified the composition of the European Commission, and enhanced the powers of the European Parliament. The treaty was designed to ensure that the EU could function effectively with a larger membership, particularly as new countries from Eastern Europe were set to join. It came into force in 2003.