The procedures for applying this chapter are laid down, for each of the processing operations mentioned in articles L. 142-1 to L. 142-4, by decree in the Conseil d’Etat, issued after consultation with the Commission nationale de l’informatique et des libertés. These decrees shall specify, in particular, the period for which personal data and recorded information are to be kept and the conditions for updating them, the categories of persons who may access them and the procedures for authorising them to do so, as well as the conditions under which the persons concerned may exercise their rights.