From 1 March 2019, employers of staff or contractors who access a coal mine site as part of their job must appoint a doctor (an Appointed Medical Advisor or AMA) from the Department of Natural Resources, Mines and Energy’s (DNRME) register.
https://www.i-q.net.au/main/changes-to-health-checks-for-coal-mine-workers
Queensland changes to health checks for coal mine workers