Does this mean I am still able to use a radio other than an aircraft radio if the opportunity arises?
No, unless:
- you hold an ACMA-issued licence covering the frequency(s) you want to operate on, or
- you hold an Authority to Transmit or Licence Authority from the service you wish to use e.g. VKS737 4WD radio network, or
- the service is covered by particular arrangements for which no licence is required but the radio equipment itself is type approved for that service e.g. CB.
The ACMA website outlines all radio communications licensing requirements.
Further here:
Marine, amateur & CB radio | ACMA
Spectrum: what it is & why you need it | ACMA