In order to establish the basis of assessment and control of taxes, duties and charges falling within the remit of the customs and excise administration and with a view to detecting fraud, the right of communication provided for in article 65 may relate to information concerning unidentified persons, under conditions laid down by a decree of the Conseil d’Etat issued after consultation with the Commission nationale de l’informatique et des libertés (National Commission for Information Technology and Civil Liberties).