Kernrechtsfrage
Whether the federal court should treat the filed constitutional complaint as an administrative law appeal and whether Art. 69 StHG applied in 1998 in Zurich.
Extrahierter Entscheid
The complaint was admissible as an administrative law appeal because the dispute concerned the canton’s implementation of binding federal harmonization law; Art. 69 StHG applied from 1999 for cantons switching their assessment system at that time.
Extrahierte Begründung
Art. 69 StHG governed the transition from the former to the new assessment system and, for Zurich, was binding from 1 January 1999. The canton could not derogate from the federal definition of extraordinary income by maintaining a closed enumeration in its own law.