In Western Australia at present anyone can legally call themselves a counsellor or psychotherapist. People who use these terms do not have to be registered with any regulative body or possess any minimum level of qualification.
Both psychiatrists and Clinical Psychologists must possess the required university qualifications and be registered with the Health Professionals Registration Board in their relevant state to be able to call themselves a psychiatrist or Clinical Psychologist and to be legally able to practice. There is a public register in each state which enables anyone to check that somebody calling themselves a Clinical Psychologist or psychiatrist is registered with the relevant authority. In Western Australia you can access this register at http://www.psychboard.wa.gov.au/ OR http://www.ahpra.gov.au/ and then by following the instructions at ‘check registration’.