Australia has three levels of overlapping government as a historical result of Federation. Leaving aside local government which is usually town-based, State and Federal electorates are administered by the Australian Electoral Commission, a statuary body set up by the Federal government and often nobbled by them for political advantage due to electoral ignorance.
Due to the proportional nature of State and Federal voting, electorates are reassessed for population balance and their boundaries change from year to year, not always to the liking of the governing party. Voting is by secret ballot and is compulsory, subject to fines. All citizens over 18 are required to be registered on the electoral roll in time for elections; this is frequently exploited by government to disenfranchise the demographic it most fears, mostly the youth vote, but just as often the poor and indigenous.