The main spaceport in New Adasta handles the bulk of commercial traffic from the surface to the various orbital stations and the Empire beyond which makes it a key location security wise. There is always a high military presence at the spaceport.
The Emperor and High ranking Imperial personnel like the Dark Council or Moffs have their own private docks that are always ready and available for their use. There is always at least one fighter wing ready to deploy at any time, in short don’t cause trouble here.
The flow of people is constant as thousands pass through Imperial Customs daily to and from the surface.