The Commission differs from the other institutions in that it alone has legislative initiative in the EU. Only the commission can make formal proposals for legislation: they cannot originate in the legislative branches. Under the Treaty of Lisbon, no legislative act is allowed in the field of the Common Foreign and Security Policy. In the other fields, the Council and Parliament are able to request legislation; in most cases the Commission initiates on the basis of these proposals. This monopoly is designed to ensure coordinated and coherent drafting of EU law. This monopoly has been challenged by some who claim the Parliament should also have the right, with most national parliaments holding the right in some respects. However, the Council and Parliament may request the commission to draft legislation, though the Commission does have the power to refuse to do so as it did in 2008 over transnational collective conventions. Under the Lisbon Treaty, EU citizens are also able to request the commission to legislate in an area via a petition carrying one million signatures, but this is not binding.