19.7.1 In case of cancellation of a flight, the passengers concerned shall:
(i) Be offered assistance by the operating air carrier in accordance with Sections 19.6. and;
(ii) Be offered assistance by the operating air carrier in accordance with Sections 19.9.1(i) and 19.9.2 as well as, in the event of re-routing when the reasonably expected time of departure of the new flight is at least the day after the departure as it was planned for the cancelled flight, the assistance specified in Sections 19.9.1(ii) and 19.9.1(iii)
(iii) In respect of domestic flights, have the right to compensation by the operating air carrier in accordance with Section 19.10 unless they are informed of the cancellation at least twenty-four hours before the scheduled time of departure ; and
(iv) In respect of international flights, have the right to compensation by the operating air carrier in accordance with Section 19.10, unless:
(a) they are informed of the cancellation at least seven days before the scheduled time of departure ; or
(b) they are informed of the cancellation between three and seven days before the scheduled time of departure and are offered re-routing, allowing them to depart not more than two hours before the scheduled time of departure and to reach their final destination less than four hours after the scheduled time of arrival ; or
(c) they are informed of the cancellation less than seven days before the scheduled time of departure and are offered re-routing, allowing them to depart not more than one hour before the scheduled time of departure and to reach their final destination less than two hours after the scheduled time of arrival.
19.7.2. When passengers are informed of the cancellation, an explanation shall be given concerning possible alternative transport.
19.7.3. An operating airline shall not be obliged to pay compensation for cancellation if it can prove that the cancellation is caused by extraordinary circumstances which could not have been avoided even if all reasonable measures had been taken (extra ordinary circumstances will include natural disasters or air traffic control strikes, and to exclude technical problems identified during routine maintenance).
19.7.4. The burden of proof concerning any question as to whether and when the passenger has been informed of the cancellation of the flight shall rest with the operating airline.