Questione giuridica chiave
Whether the federal appeal was filed within the statutory 30-day time limit.
Decisione estratta
The written submissions were filed after expiry of the appeal period and were therefore inadmissible.
Motivazione estratta
The appeal period under Art. 100(1) LTF had already lapsed; submissions of 17 and 26 September 2013 were late, with no applicable extension saving them.