Key legal question
Whether the appellants were entitled to challenge transmission of X.'s interrogation transcript
Extracted holding
The appellants lacked standing to contest transmission of the transcript; X. was not directly affected by a measure in the mutual assistance proceedings, and the transcript was taken in a separate Swiss criminal case.
Extracted reasoning
Only persons directly subjected to the assistance measure may appeal. The transcript was held by a third party and X. was neither compelled to produce it nor questioned as a witness in the assistance case.