Use of controlled rest on flight deck
181.—(1)  An AOC holder may allow controlled rest on the flight deck as a fatigue mitigation response to unexpected fatigue experienced by a flight crew member during a flight of a large aeroplane only if —
(a)the flight is of sufficient length such that taking a controlled rest does not interfere with the flight crew member’s required operational duties; and
(b)the controlled rest takes place during low workload phases of flight.
(2)  An AOC holder must not use controlled rest on the flight deck for the following purposes:
(a)as a substitute for proper pre‑flight sleep;
(b)as a substitute for augmented crew and associated inflight rest;
(c)as a scheduling tool;
(d)as a method for extending crew duty periods.
(3)  An AOC holder must monitor the use of controlled rest on the flight deck to evaluate whether existing fatigue mitigation strategies are adequate.
(4)  The pilot‑in‑command of a large aeroplane must report to the AOC holder when controlled rest on the flight deck has been availed.
(5)  An AOC holder must, on a regular basis, submit to the Director‑General of Civil Aviation a report containing all the instances when controlled rest was availed to.
(6)  An AOC holder must establish procedures for controlled rest on the flight deck and include these procedures in the Operations Manual.