Key legal question
Whether the staatsrechtliche Beschwerde was admissible alongside the Verwaltungsgerichtsbeschwerde
Extracted holding
The constitutional complaint was inadmissible because the matter concerned the implementation of binding federal harmonization law and the administrative appeal was the proper remedy.
Extracted reasoning
Where cantonal provisions operate merely as implementing rules for Art. 69 StHG, federal administrative appeal lies; a parallel constitutional complaint is excluded.