Question juridique clé
Whether the public law appeal was admissible against an international administrative assistance decision, including the recusal ruling on the panel.
Solution extraite
The appeal was inadmissible because Art. 83 letter h LTF excludes public law appeals in international administrative assistance matters, including incidental procedural rulings.
Motifs extraits
The exclusion ground covers both the merits and procedural aspects under the unity of proceedings; a separately issued interlocutory decision is also barred from ordinary appeal.