When issuing a European Investigation Order for the seizure of evidence, the magistrate shall specify in the order:
either
1° that the evidence is to be transferred to him;
or
2° or that it must be preserved in the executing State in order to prevent its destruction, transformation, removal or disposal until a date to be determined by the executing State, without prejudice to the possibility of requesting the transfer of the evidence before that date;
If the evidence transferred has not been placed under seal by the executing authority, it shall be placed under seal in accordance with the provisions of this Code. If required by the executing authority at the time of transfer, such items shall be returned to it as soon as they are no longer required for the proceedings in progress.