This article is about the Australian meaning of the term. For the British sense (the right of tenant not to be evicted from their rented residential property without due process), see Leasehold estate § Tenancy at will.
Security of tenure is a term with multiple meanings according to jurisdiction. In Australia, it is used in political science to describe a constitutional or legal guarantee that a political office-holder cannot be removed from office except in exceptional and specified circumstances.
Without (political) security of tenure, an office-holder may find his or her ability to carry out their powers, functions and duties restricted by the fear that whoever disapproves of any of their decisions may be able to easily remove them from office in revenge. Security of tenure offers protection, by ensuring that an office-holder cannot be victimised for exercising their powers, functions and duties. It enables the democratic or constitutional methodology through which an office-holder comes to office not to be overturned except in the strictest and most extreme cases.