To crush your enemies, see them driven before you, and hear the lamentations of the players trying to understand your rules FAQ.
Any interpretation I come to is uncertain... there's information missing in the entry regarding the situation it feels like. Either where the other troops of the order is, or there's a typo, or something. Only thing that seems consistent is that you seem to be able to declare ARO against a Stealth-using trooper without having a confirmed ARO granted to you, and then find out at step 5+ if your ARO is valid or not.