The system used varies across the different jurisdictions. https://en.wikipedia.org/wiki/Hare%E2%80%93Clark_electoral_system https://en.wikipedia.org/wiki/Hare%

The system used varies across the different jurisdictions. https://en.wikipedia.org/wiki/Hare%E2%80%93Clark_electoral_system https://en.wikipedia.org/wiki/Hare%E2%80%93Clark_electoral_s..., https://en.wikipedia.org/wiki/Instant-runoff_voting#Australia https://en.wikipedia.org/wiki/Instant-runoff_voting#Australi... and https://en.wikipedia.org/wiki/Single_transferable_vote#Australia https://en.wikipedia.org/wiki/Single_transferable_vote#Austr... cover the majority of systems we have (most of the differences/changes are subtle, see https://antonygreen.com.au/inclusive-gregory-another-serious-problem-with-the-victorian-legislative-councils-electoral-system/ https://antonygreen.com.au/inclusive-gregory-another-serious... for example).