Singapore legislation
Regulation 88
of Air Navigation (125 — Complex General Aviation) Regulations 2018
Regulation 88
Device to warn flight crew of loss of pressurisation
A CGAC holder must ensure that every pressurised aeroplane that is to be operated at any altitude above 25,000 ft during a complex general aviation operation is equipped with a device to provide positive warning to the flight crew of any dangerous loss of pressurisation.