Questão jurídica principal
Whether Bank X. was entitled to appeal only as directly affected party and not on behalf of its customers
Decisão extraída
The bank had standing only for measures directly affecting it; it could not complain on behalf of its customers.
Fundamentação extraída
A bank may challenge mutual assistance measures only insofar as it is itself directly affected. The requested files concerned the bank's own activities and internal documents, but not the customers' privacy as such.