The Lisbon Treaty

Zahn, Rebecca; (2022) The Lisbon Treaty. In: Oxford Encyclopaedia of EU Law. Oxford University Press, Oxford. (

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The Lisbon Treaty is the short descriptor of the Lisbon Treaty amending the Treaty on European Union and the Treaty establishing the European Community (OJ C 306, 17.12.2007), signed at Lisbon on 13 December 2007. The Treaty entered into force on 1 December 2009. The EU's institutions, processes and competences are governed by two Treaties: the Treaty on European Union (TEU) (OJ C 202, 7.6.2016) and the Treaty on the Functioning of the European Union (TFEU) (OJ C 202, 7.6.2016). The TFEU was named the Treaty establishing the European Community (TEC) until 2009. The Lisbon Treaty is a binding agreement between the Member States which makes a number of amendments to the TEU and the TFEU with the aim of making the EU more democratic, more efficient and better able to address global problems.


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