Questione giuridica chiave
Whether the appeal against the cantonal non-entry decision was admissible and whether additional briefing could be allowed.
Decisione estratta
The criminal-law appeal was admissible in principle, but no extension of the filing period or supplementary brief could be granted.
Motivazione estratta
Statutory deadlines cannot be extended; Art. 43 BGG applies only to mutual legal assistance in criminal matters, not to this case.