1. Devices for the electronic receipt of tenders and applications must at least guarantee, through technical means and appropriate procedures, that:
(a) the exact time and date of the receipt of tenders and applications can be determined precisely;
(a) it may be reasonably ensured that, before the time limits laid down, no-one can have access to data transmitted under these requirements;
(b) where that access prohibition is infringed, it may be reasonably ensured that the infringement is clearly detectable;
(c) only authorised persons may set or change the dates for opening data received;
(d) during the different stages of the concession award procedure access to all data submitted, or to part thereof, must be possible only through simultaneous action by authorised persons;
(e) simultaneous action by authorised persons must give access to data transmitted only after the prescribed date;
(f) data received and opened in accordance with these requirements must remain accessible only to persons authorised to acquaint themselves therewith, and
(g) authentication of tenders must conform to the requirements set out in this Annex.