Composition of flight crew
131.  For every flight of a large aeroplane, the AOC holder must ensure that —
(a)the number and composition of the assigned flight crew is not less than the requirements specified in the AOC holder’s Operations Manual; and
(b)the assigned flight crew includes flight crew members in addition to the minimum number specified in the aircraft flight manual or other documents associated with the aeroplane’s Certificate of Airworthiness, when necessitated by considerations related to —
(i)the aeroplane type used;
(ii)the type of operation involved; and
(iii)the duration of flight between points where flight crews are changed.