Question juridique clé
Admissibility of the public law appeal and of the subsidiary constitutional complaint
Solution extraite
The public law appeal was admissible because the claim could potentially arise under federal law; the subsidiary constitutional complaint was therefore inadmissible.
Motifs extraits
Whether Art. 49 or 50 LEtr granted a right to renewal was a merits question, not a jurisdictional one, so Art. 83(c)(2) LTF did not bar the appeal.