The Member States 25 March 1957, Consolidated version of the Treaty on the Functioning of the European Union#PART THREE - UNION POLICIES AND INTERNAL ACTIONS#TITLE V - AREA OF FREEDOM, SECURITY AND JUSTICE#CHAPTER 1 - GENERAL PROVISIONS#Article 73

7.6.2016 EN Official Journal of the European Union C 202/74 Article 73 It shall be open to Member States to organise between themselves and under their responsibility such forms of cooperation and coordination as they deem appropriate between the competent departments of their administrations responsible for safeguarding national security.