Questione giuridica chiave
Whether the subsidiary constitutional complaint was admissible despite no enforceable right to renewal of the residence permit.
Decisione estratta
No. Without a legally protected interest, the appellant lacked standing to challenge the permit refusal on the merits.
Motivazione estratta
Where no entitlement to the permit exists, an ordinary public-law appeal is excluded and the subsidiary constitutional complaint cannot be used to obtain substantive review.