Treaty of Lisbon: Article 1 - Treaty on European Union… (2007)
“ Not less than one million citizens who are nationals of a significant number of Member States may take the initiative of inviting the Commission, within the framework of its powers, to submit any appropriate proposal on matters where citizens consider that a legal act of the Union is required for the purpose of implementing the Treaties.The procedures and conditions required for such a citizens' initiative shall be determined in accordance with the first paragraph of Article 21 of the Treaty on the Functioning of the European Union. ”
