Questione giuridica chiave
Whether the appeal is admissible despite non-payment of the required advance court costs within the extended time limit.
Decisione estratta
The appeal is inadmissible because the advance court costs were not paid within the additional non-extendable deadline.
Motivazione estratta
Under Art. 62(3) LTF, failure to pay the advance within the set extended deadline leads to inadmissibility; costs are imposed on the appellant under Art. 66(1) LTF.