Questione giuridica chiave
Whether the appeal had to be entered into despite non-payment of the cost advance within the extended time limit.
Decisione estratta
The appeal could not be entered into because the cost advance was not paid even after the grace period expired.
Motivazione estratta
Under Art. 62(3) BGG, failure to pay the cost advance after a warning leads, in simplified procedure under Art. 108(1)(a) BGG, to non-entry.