[quote=@Hank]
<Snipped quote by Andreyich>

Actually, they're not. Commissars are formally a part of the Militarum Tempestus as part of the Departmento Munitorum's Commissariat and are empowered to execute [i]anyone[/i] that gets in the way of proper Imperial discipline, with the only exceptions I can think of being the Adeptus Astartes and the Holy Inquisition... for obvious reasons. 
[/quote]


Thought you'd get away with it, eh? :lol

Hank is correct though; feel free to act as you will, just don't get in the way of that discipline...otherwise 'blam'!