The principle of conferral is a fundamental principle of European Union law. According to this principle, the EU is a union of its member states, and all its competences are voluntarily conferred on it by its member states. The Union has no competences by right, and thus any areas of policy not explicitly agreed in treaties by all member states remain the domain of the member states. This indicates that the member states have the right to deal with all matters that fall outside the agreements of the Treaties and the EU can only act within the conferred competences defined by the Member States in the treaties.