It has been argued in many places, and in different forms, that the establishment between the EU Member States of an internal market, and now of an area of freedom, security and justice, requires the European Union to legislate in the field of fundamental rights, either in order to avoid a form of regulatory competition between the Member States or in order to ensure mutual trust allowing for mutual cooperation between judicial, police and administrative national authorities. ‘Negative integration’, in the form of the lowering of barriers to the movement of goods, services, persons and capital, or in the form of mutual recognition of judicial decisions or exchange of information between national authorities, should thus be followed with, or compensated by, ‘positive integration’, in the form of the setting of common standards applicable throughout the EU Member States. The EU Charter of Fundamental Rights, moreover, provides the baseline from which to act, since it represents a set of values which all the Member States have agreed to consider as fundamental. The question (so it would seem) is now that of implementing the Charter, by using the legal bases provided for in the treaties to the fullest extent possible.