Key legal question
Whether the public-law appeal was admissible despite the immigration nature of the permit request.
Extracted holding
The appeal was admissible insofar as the Swiss spouse could invoke a potential entitlement under Art. 42 LEtr and Art. 8 ECHR.
Extracted reasoning
For admissibility, it is enough that a plausible statutory or convention-based right is invoked; it is not decisive whether the right will ultimately succeed or be defeated by revocation grounds.