Questione giuridica chiave
Whether the public-law appeal was admissible against the denial of party status in a denunciation-based administrative procedure.
Decisione estratta
The appeal was admissible only to the limited extent of challenging the denial of party status.
Motivazione estratta
A complainant generally cannot attack a mere non-action or refusal to act on a denunciation by public-law appeal, but may still contest being wrongly denied party status.