2.   The Government of any Member State, the European Parliament or the Commission may submit to the Council proposals for the amendment of the Treaties. These proposals may, inter alia, serve either to increase or to reduce the competences conferred on the Union in the Treaties. These proposals shall be submitted to the European Council by the Council and the national Parliaments shall be notified.

3.   If the European Council, after consulting the European Parliament and the Commission, adopts by a simple majority a decision in favour of examining the proposed amendments, the President of the European Council shall convene a Convention composed of representatives of the national Parliaments, of the Heads of State or Government of the Member States, of the European Parliament and of the Commission. The European Central Bank shall also be consulted in the case of institutional changes in the monetary area. The Convention shall examine the proposals for amendments and shall adopt by consensus a recommendation to a conference of representatives of the governments of the Member States as provided for in paragraph 4.

The European Council may decide by a simple majority, after obtaining the consent of the European Parliament, not to convene a Convention should this not be justified by the extent of the proposed amendments. In the latter case, the European Council shall define the terms of reference for a conference of representatives of the governments of the Member States.

4.   A conference of representatives of the governments of the Member States shall be convened by the President of the Council for the purpose of determining by common accord the amendments to be made to the Treaties.

The amendments shall enter into force after being ratified by all the Member States in accordance with their respective constitutional requirements.

5.   If, two years after the signature of a treaty amending the Treaties, four fifths of the Member States have ratified it and one or more Member States have encountered difficulties in proceeding with ratification, the matter shall be referred to the European Council.