Singapore legislation
Regulation 174
of Air Navigation (135 — Commercial Air Transport by Helicopters and Small Aeroplanes) Regulations 2018
Regulation 174
Use of controlled rest on flight deck
Subregulation 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 relevant aircraft only if —
the flight is of sufficient length such that the taking of a controlled rest does not interfere with the flight crew member’s required operational duties; and
the controlled rest takes place during a low workload phase of flight.
Subregulation 2
An AOC holder must not use controlled rest on the flight deck for the following purposes:
as a substitute for proper pre‑flight sleep;
as a substitute for augmented crew and associated inflight rest;
as a scheduling tool;
as a method for extending crew duty periods.
Subregulation 3
An AOC holder must monitor the use of controlled rest on the flight deck to evaluate whether existing fatigue mitigation strategies are adequate.
Subregulation 4
The pilot-in-command of a relevant aircraft must report to the AOC holder when controlled rest on the flight deck has been availed.
Subregulation 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 since the last such report.
Subregulation 6
An AOC holder must establish procedures for the use of controlled rest on the flight deck of a relevant aircraft.