Preferential Voting in Single Member Electorates - Western Australia

Electoral Authority: Western Australian Electoral Commission
Parliament which uses Preferential Voting	Legislative Assembly (Lower House)
Name of Preferential Voting system	Full preferential
Formality/Informality points	Formal A formal ballot paper clearly indicates the elector's intention with respect to the order of preference for all candidates, i.e. all squares have been numbered consecutively. A ballot paper may still be considered formal where: A ballot paper has only two candidates, and only one square is marked showing a clear preference for the elector's preferred candidate. A ballot paper that has been completed but not numbered consecutively, i.e. a number has been repeated or omitted, as the preferences can be distributed until the point of the error, where the vote becomes exhausted. Informal A ballot paper is informal if it: is blank does not show preferences according to the instructions does not make the voter's intention clear or is marked in a way that identifies the voter.
Directions on the Ballot Paper	Number the boxes from 1 to N in the order of your choice. Remember… Number every box to make your vote count *N refers to the total number of candidates.
Casual Vacancies	A casual vacancy is filled through a by-election.