11. In article 56 for paragraphs (1) and (2) there shall be substituted:
“(1) On any flight on which a flight recorder is required in accordance with article 15 to be carried in an aeroplane, it shall be operated continuously from the time the first engine is started for the purpose of making a flight until the time the last engine is shut down after landing.
(2) On any flight on which a flight recorder is required in accordance with article 15 to be carried in a helicopter, it shall be operated continuously from the time the rotors first turn for the purpose of making a flight until the rotors are next stopped.”