Crew member recurrent segment
157.—(1)  An AOC holder must ensure every person, who is on the AOC holder’s roster to be assigned duty as a crew member on a flight of a large aeroplane, is adequately trained, current and proficient in the aeroplane, crew member role and type of operation, that the person may be assigned duty in.
(2)  An AOC holder must ensure that every person, who is on the AOC holder’s roster to be assigned duty as a crew member for a flight of a large aeroplane completes the recurrent segment of the AOC holder’s training programme provided in accordance with regulation 143 —
(a)in a structured manner (including passing a written test); and
(b)at least once every 12 months.