Regents except the Admiral follow these rules if they do not have Imperial Officers or Rogue Admirals:
You cannot Command the Imperial Fleet. (On your turn, you don't control Empire-controlled systems and can't take actions with Imperial ships.)
If you're the First Regent, you don't control Empire-controlled systems for ambitions, objectives, and events.
When taking a Catapult move, Empire control of gates ends your move.
Act: 3
A: No.
A: No. Even though it prevents some Regents from Commanding the Imperial Fleet, you still have to follow the Truce Law.