Key legal question
Whether the complaint against the cantonal tax appeal judgment was admissible under Art. 86 BGG
Extracted holding
The cantonal tax appeal court could serve as a direct federal-court instance despite not being an upper court in the usual sense, so the complaint was admissible.
Extracted reasoning
For certain federal tax regimes, the previous specialized cantonal appeal commission system was deliberately retained; Art. 86(2) BGG allows other judicial authorities required by federal law.