Question juridique clé
Whether the complaint in public law matters was admissible despite no statutory reunification right under Art. 44 AuG.
Solution extraite
The appeal was admissible because the mother could invoke Art. 8 ECHR and Art. 13 BV through her established residence rights and the factual family relationship to her son.
Motifs extraits
A potential Convention-based claim suffices for admissibility; the court then examines the merits separately.