Questione giuridica chiave
Whether the public-law appeal had to be declared inadmissible for non-payment of the court advance.
Decisione estratta
Yes. After two deadlines expired without payment, the appeal was inadmissible under Art. 62 para. 3 LTF.
Motivazione estratta
The appellant was first ordered to pay CHF 4,000 and then given an additional deadline with an explicit warning of inadmissibility. As no payment was made in time, the statutory sanction followed.