Mr Cooper wrote
The CAAP for CA/GRS defines relevant traffic as;
"Aircraft that the CA/GRO knows to be operating within the MBZ and that may constitute a hazard to a broadcasting aircraft."
MOS 139 Chapter 14 Specifies
14.2.3.1 A CA/GRS must provide the following services to aircraft within airspace designated as an MBZ area in which the aerodrome is located:
(a) advice of relevant air traffic in the MBZ airspace or on the aerodrome;
Obvious Question: What is the basis for the provision of CA/GRO at any aerodrome outside an MBZ?
Mr Cooper wrote
This has obviously has not been updated since the demise of MBZs, and probably should read "within the vicinity of a CTAF(R) aerodrome".
So clearly the provision of CA/GRO services is not supported by CASA at this point in time.
Given the vague "relevant traffic" and the lack of supporting MOS, the whole thing sounds shonky IMHO.