Questão jurídica principal
Whether the civil appeal against the arbitration award was admissible despite non-payment of the advance on costs.
Decisão extraída
The appeal was inadmissible because the appellant did not pay the advance on costs within the additional deadline set under Art. 62(3) LTF.
Fundamentação extraída
After the first deadline passed without payment, the appellant was given a final non-extendable grace period. As the amount was still unpaid by then, the statutory consequence of inadmissibility applied, and the simplified procedure under Art. 108(1) LTF was used.