Kernrechtsfrage
Whether the cantonal tax office could file a public-law appeal under the Tax Harmonization Act.
Extrahierter Entscheid
Yes. The cantonal authority designated under cantonal law is entitled to appeal, and it may invoke any violation of law within its remit.
Extrahierte Begründung
Art. 73 StHG authorizes the competent cantonal authority to appeal to the Federal Supreme Court; this also covers federal-law review.