The Court observes first of all that the data to be retained make it possible, in particular, (1) to know the identity of the person with whom a subscriber or registered user has communicated and by what means, (2) to identify the time of the communication as well as the place from which that communication took place and (3) to know the frequency of the communications of the subscriber or registered user with certain persons during a given period.
Euroopa Kohus sedastab kõigepealt, et säilitatavad andmed võimaldavad muu hulgas 1) teada, millise isikuga ja millist vahendit kasutades abonent või registreeritud kasutaja suhtles, 2) teha kindlaks sideseansi aeg ja selle toimumise koht ning 3) teada, kui sageli abonent või registreeritud kasutaja teatud isikutega mingil ajavahemikul suhtles.