Question juridique clé
Whether the administrative appeal against revocation of the residence permits was admissible
Solution extraite
The appeal was admissible insofar as it challenged the cantonal judgment confirming revocation, but inadmissible as to the request to annul the first-instance decision directly.
Motifs extraits
Revocation decisions can be challenged by administrative-law appeal; however, the devolutive effect excludes direct challenge to the lower decision.