Kernrechtsfrage
Whether the appeal could challenge matters outside the contested mutual assistance decision and whether the appellant had standing.
Extrahierter Entscheid
The court entered only on issues forming part of the challenged assistance decision; the appellant had standing as account holder directly affected by the measures.
Extrahierte Begründung
The appeal is limited to the subject matter of the BJ decision, but the account holder is directly affected and thus entitled to complain.