Article D of the Treaty on European Union states:
The European Council shall provide the Union with the necessary impetus for its development and shall define the general political guidelines thereof.
The European Council is required to meet at least twice each year under the Chair of the Head of State or Government of the State which holds the Presidency of the Council, thus ensuring adequate opportunity to review the Union's agenda. On occasion, additional meetings of the European Council are held such as the Special European Council in Turin last March which launched the Intergovernmental Conference.