Think of the No Jab No Pay/Play policy and now add to it.
Its never mandatory.
No Jab - No Job - No Travel - No [INSERT COMMERCIAL SERVICE] eg: Shopping, Sporting Activities
Essentially NO JAB = NO LIFE
"While the Australian Government strongly supports immunisation and will run a strong campaign to encourage vaccination, it is not mandatory and individuals may choose not to vaccinate. There may however, be circumstances where the Australian Government and other governments may introduce border entry or re-entry requirements that are conditional on proof of vaccination."
Monitored by all things .... AIR
"The AIR will be the unifying national system to monitor both overall immunisation levels and individual immunisation status. It will be mandatory for vaccination providers to make timely recordings of any COVID-19 vaccinations into AIR"