According to Sir Zelman Cowan, the reserve powers of the Crown include the power to dismiss a ministry, to grant or refuse dissolution, and to designate a prime minister.    Few legal observers would deny the existence of the reserve powers, although in controversial cases there is a debate as to the manner and time of their use.   In Australia, these powers are exercisable at the federal level by the governor-general. They are not reviewable by the courts, not being justiciable, nor is it for The Queen to review their exercise.  .It is therefore inappropriate for a viceroy to discuss their exercise in advance with the Sovereign.In addition, it is relevant at this point to recall that The Queen of Australia can alone exercise certain important powers of the Crown. These relate to the appointment and dismissal of the viceroys. This is normally done on advice tendered in writing in an original document, but there is argument that this too is in the nature of a reserve power.  Certainly there are indications that it would be an error to regard The Queen as an automaton, assenting without question to advice, particularly that relating to a dismissal.    The existence of these powers is an important constitutional check and balance on the exercise of power. …Interesting Links… Reserve Powers of the Governor-General and The Provisions for Dismissal by Sir Harry Gibbs, former Chief Justice An Historical Perspective On The Reserve Powers, by  JB Paul  21 August 1999 Examples Of The Use Of Vice-Regal Power In Australia Since Federation