Singapore legislation
Regulation 78
of Air Navigation (91 — General Operating Rules) Regulations 2018
Regulation 78
Communication equipment
Subregulation 1
An operator of a Singapore registered aircraft must ensure that the aircraft is equipped with —
radio communication equipment that is capable of providing a continuous two-way communication with an appropriate air traffic services unit or aeronautical telecommunications facility, and receiving meteorological information, at any time during the flight; and
a headset with a boom or throat microphone.
Subregulation 2
The radio communication equipment required under paragraph (1)(a) must provide for communication on the emergency frequency 121.5 MHz.
Subregulation 3
An operator of a Singapore registered aircraft must not operate the aircraft in defined portions of airspace or on a route where the appropriate air traffic services authority has specified a required communications performance for performance‑based communication unless —
the aircraft is equipped with the capability of operating in accordance with the specified required communications performance; and
the operator has an approval granted by the Director‑General of Civil Aviation under the Air Navigation (98 — Special Operations) Regulations 2018 for that purpose.