Kernrechtsfrage
Whether the public-law appeal was admissible despite the exclusion clause for foreign-residence permits.
Extrahierter Entscheid
The appeal was admissible insofar as the facts could potentially give rise to a right under Article 8 ECHR.
Extrahierte Begründung
Because the father had a residence right in Switzerland through marriage to a Swiss national, the son's request was potentially capable of engaging Article 8 ECHR; admissibility depended on the merits, not on receipt of a right already established.