Key legal question
Whether the appeal should be entered into despite non-payment of the advance on costs within the set deadline.
Extracted holding
No. The final additional deadline was expressly non-extendable and the advance was not paid in time.
Extracted reasoning
Under Art. 62(3) LTF, failure to pay the advance on costs after an express warning leads to non-entry; the simplified procedure under Art. 108(1)(a) LTF applies.