Questione giuridica chiave
Whether the cantonal court violated the right to be heard by raising active standing ex officio without prior notice.
Decisione estratta
Yes. Because active standing had not been put in issue earlier and could not reasonably have been anticipated, the parties had to be heard before the appeal court relied on it.
Motivazione estratta
The court may examine standing ex officio, but under the adversarial and dispositive framework it must notify the parties if it intends to base its decision on a new legal ground and factual perspective that was not previously raised and was not foreseeable.