Kernrechtsfrage
Whether the sewer connection fee violated the equivalence principle and Article 60a GSchG by using building volume as the fee basis for a high-bay warehouse.
Extrahierter Entscheid
No. For one-time connection fees, the causation principle does not require exclusive reliance on actual future wastewater volume; building volume is an admissible and generally suitable proxy, and the reduced tariff for storage buildings produced acceptable results.
Extrahierte Begründung
The court held that Article 60a GSchG primarily governs periodic user fees. Connection fees may also be based on other causally relevant criteria, especially where actual future wastewater is uncertain at the time of assessment. The volume-based tariff was a practical schematization and not an obvious disproportion.