Key legal question
Whether the appeal was admissible under Art. 84 BGG as an exceptionally important case involving mutual legal assistance
Extracted holding
The case was not exceptionally important; the appeal could not be heard on the merits.
Extracted reasoning
Although bank records from the confidential sphere were involved, the appellant did not show any extraordinary significance. The lower court had addressed the key objections and applied settled case law; no serious procedural defects or other exceptional circumstances were shown.