Currently there is no South Australian Branch of the Australian Institute of International Affairs. If you are in South Australia and are interested in the institute, you may join the AIIA as a subscriber for access to webinars and events. This is available on this page.
Please note that at this stage, the options at the above link will give you a general subscription to the AIIA. This does not yet entail membership of an organisation.
The AIIA is committed to establishing an active program in South Australia. The AIIA is looking for energetic people to take its programs forward in the state. If you are interested in getting involved, contact firstname.lastname@example.org.