Key legal question
Whether the constitutional complaint sufficiently challenged the cantonal court's non-entry decision.
Extracted holding
No. The filing addressed only the substantive issue of spousal joint tax liability and did not specifically and clearly attack the non-entry decision or show arbitrariness in the application of cantonal procedural law.
Extracted reasoning
In constitutional complaint proceedings, the Federal Supreme Court reviews only clearly raised and substantiated constitutional arguments. Because the appellant did not engage with the challenged non-entry ruling, the merits of joint liability were not before the court, and the complaint lacked the required reasoning.