Kernrechtsfrage
Whether the municipality's constitutional complaint was admissible in light of the administrative law appeal on the same point.
Extrahierter Entscheid
The constitutional complaint was inadmissible because the interest-period issue could be reviewed under the administrative law appeal and was in fact examined there.
Extrahierte Begründung
Where a legal question falls within the scope of the administrative law appeal and is dealt with on the merits, there is no room for a separate constitutional complaint.