Questão jurídica principal
Whether the appeal had to be dismissed for failure to pay the required advance on costs within the non-extendable deadline.
Decisão extraída
Yes. The appellant did not pay the advance within the additional deadline, and the request for an extension could not be granted because the deadline was expressly non-extendable.
Fundamentação extraída
Under Art. 62(3) LTF, non-payment after expiry of the set deadline leads to inadmissibility. The court therefore applied the simplified procedure under Art. 108(1)(a) LTF.