Australia (especially the states) has a habit of passing constitutional practice in legislation. For instance the Federal AG having to consult with the state AGs before appointing a High Court judge is in a statutory act. So a lot of these practices can be put into legislation. It means a future government can blast them away if they want, which they cant with a constitution, but it could be done now that way.
'Sworn to no party, and of no sect am I.' Frederick Vosper's republican motto.
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