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Treaty of Lisbon

Published October 19, 2007

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Treaty

Treaty of Lisbon

This text amended the Treaty on European Union (Treaty of Maastricht) and the Treaty Establishing the European Community (Treaty of Rome). European leaders signed it on December 13, 2007; it entered into force on December 1, 2009. The amendments updated voting and legal procedures in the European Parliament, made the Charter of Fundamental Rights binding, and provided EU members the option to leave and to rejoin the EU.

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