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No radio-communication equipment fitted in an aircraft shall be operated or used while such aircraft is at rest on land or on water in Brunei Darussalam except-

1963

(a} in exceptional cases or in time of emergency or distress;

in exceptional circumstances if communication by means of a telecommunication line system is not available, for communication on matters relating to air navigation and services with the nearest aeronautical station, or, if communication with such station is impracticable, with any other station;

for the purpose of carrying out experimental tests with the written approval of and subject to such conditions as the Authority may determine;

for the purpose of carrying out functional tests on frequencies other than on international distress frequencies to determine the service ability of the radio-communication equipment.