Of course Tarkin/Vader/Thrawn could usurp control from a Governor... They held absolute authority in nearly *any* setting, tbh. Barring the aforementioned 'Imperial Triumvirate', however, it was just dependent on the particular planet's standing within the Empire.
For example, if the planet in question was considered a FULL military zone, then standard Admirals held authority =/> the Governor of that particular system. But if said planet wasn't considered a FULL military zone, then not even Admirals held direct authority over its Governor.
That said, if indeed the system held FULL military status(which is a status that most planets wanted, thanks to the 'perks' that came with it), then the Governor wielded substantial military power as a corollary(*see Pryce on Lothal*.)
__________________
"I am tired of Earth. These people.
I am tired of being caught in the tangle of their lives."
Last edited by Galan007 on Apr 1st, 2018 at 12:01 AM