Kernrechtsfrage
Whether Y. had standing to appeal in the cantonal and federal proceedings
Extrahierter Entscheid
Y. was not personally and directly affected by the mutual assistance measures, so the cantonal court rightly refused to enter on his appeal; he could still rely on the company's arguments because the company itself had standing.
Extrahierte Begründung
Only the account holder is directly affected by account information measures. A merely economically interested person or controller of the company is exceptionally entitled only if the company has been dissolved, which was neither alleged nor proved.