Questione giuridica chiave
Whether the appellants had standing to challenge transmission of witness interview records.
Decisione estratta
They lacked standing, because third parties generally may not appeal the transmission of witness statements and the exceptional case for bank-account-related information was not shown.
Motivazione estratta
Mutual-assistance standing is limited to the account holder or the person directly subject to coercive measures; the appellants were only indirectly affected and failed to show that the testimony was equivalent to transmitting bank records concerning them.