Kernrechtsfrage
Whether the cantonal appeal against the cost ruling was timely despite the incorrect legal remedy notice
Extrahierter Entscheid
The tenant could rely on the incorrect legal remedy notice; the appeal had to be treated as timely.
Extrahierte Begründung
For a legally represented party, only gross procedural negligence defeats reliance on an incorrect remedy notice. The applicable appeal period was not clearly ascertainable from the statutory text alone, so the party's reliance was protected by good faith.