Key legal question
Whether an appeal is admissible against an incidental MLAT order authorizing foreign prosecutors to attend the review of seized documents.
Extracted holding
The appeal was inadmissible because the appellant failed to show an immediate and irreparable prejudice from the foreign prosecutors' presence.
Extracted reasoning
Such presence is only exceptionally appealable; any risk to secrecy can be prevented by Swiss safeguards and by deferring transmission until the closing decision. The appellant relied only on the existence of bank-secrecy material, which was insufficient.