Taken from the booklet entitled "UNICOM" - an air ground radio communication facility for Australian Aerodromes (published January 1992 and issued by the Civil Aviation Authority).
UNICOM (Universal Communications) is an air/ground radio communication facility to provide advice on local conditions such as weather information, runway in use and known traffic at some non-controlled aerodromes in Australia. The services provided by Unicom may include:
(a) ordering fuel;
(b) providing estimated times of arrival and departure;
(c) aerodrome information;
(d) information concerning the maintenance and servicing of aircraft including the ordering of parts and materials urgently required;
(e) passenger requirements;
(f) general weather reports.
These services will normally be available during the times the Unicom is listed as operating.
The Unicom operator is solely responsible for the accuracy of any information passed on to an aircraft, and the use of the information obtained from a Unicom is at the discretion of the pilot in command.
Weather reports, other than simple factual statements, may not be provided by Unicom operators unless they are properly authorised under Civil Aviation Regulation 120.
Unicom services must be licensed by the Department of Transport and Communications (DoTaC).