Question juridique clé
Whether the federal judgment could be challenged by ordinary public-law appeal or only by subsidiary constitutional complaint
Solution extraite
No enforceable statutory or treaty-based right to a residence or settlement permit existed, so only a subsidiary constitutional complaint was available.
Motifs extraits
Without a legal entitlement, Article 83(c)(2) BGG excludes the ordinary public-law appeal; only constitutional rights may be invoked in the subsidiary remedy.