In what cases any claims cannot be filed?

No claim can be filed for any delay, interruption, cancellation, or itinerary change due to public order  and security reasons, in application of relevant law provisions (as case d, par 3, Article 6th, Law 2932/01), or Competent Authority relevant orders, in general, and specifically for the salvage of ships or persons in distress at sea, or a possible approved a scheduled itinerary change to serve Emergency transport needs or public interest.