Ambulance cover is provided by the State government in Tasmania (https://www.health.tas.gov.au/ambulance/fees_and_accounts) and Queensland (https://www.ambulance.qld.gov.au). In other states concession card holders may have free cover and there are subscription services in several states (https://privatehealth.gov.au/health_insurance/what_is_covered/ambulance.htm).
For further information about this policy see: https://www.mildurahealthfund.com.au