Clinical Psychology students are required to apply for provisional registration via the online registration form on the Psychology Board of Australia website. You will need provisional registration before starting your postgraduate degree. The application involves several requirements, including: criminal history check, English language skills, recency of practice and indemnity insurance. Details can be found on the AHPRA and Psychology Board website (Psychology Board of Australia - Provisional registration)
If you have submitted your provisional registration application and are waiting for it to be approved, you can commence coursework, but you must not start any supervised practice placement. You need to renew provisional registration annually, from the date you were initially approved. You must maintain provisional registration for the entire duration of your enrolment in the degree, including while undertaking coursework, placement and research thesis.