Questão jurídica principal
Whether the constitutional appeal was admissible despite non-payment of the required advance on costs within the extended deadline.
Decisão extraída
The appeal was inadmissible because the advance on costs was not paid within the time limits set.
Fundamentação extraída
The appellant failed to pay the requested advance of CHF 400 even after an additional deadline under Art. 62(3) LTF; therefore inadmissibility followed under Art. 62(3) and Art. 108(1)(a) LTF.