Question juridique clé
Whether the appeal was admissible despite the immigration permit context.
Solution extraite
The appeal was admissible in principle because the appellant invoked a colorable right under Arts. 50 LEtr and 8 ECHR; whether that right actually exists belongs to the merits.
Motifs extraits
A possible entitlement under federal or international law suffices for jurisdiction under Art. 83 let. c ch. 2 LTF.