It's a common sense thing. Kaian has got my vote in this case.
I look at his posts and see a lack of anything interesting or worthwhile as a plotline. "He stayed home" is not the plot summary of many books.
I could argue him point by point on merits. I could draw out the
Constitutio Pacis of 1215 that enjoined nobles to allow free travel on public roads. Legally, going down those roads with lawful retainers is not construable as rebellion. We're a knight openly displaying his heraldry, fulfilling his duties as a guardian of the land. A king's justiciar would not confuse that with rebellion. Would the Count attack, anyway? Maybe. But we're mounted on horses for a reason. We're not even planning to immediately engage without observing the conditions for ourselves. This "send scouts and wait a month" thing gets really old, and it is also reacting rather than acting.
But that's pointless. The "law" that he can't actually cite is merely his screen to play a low-risk game. This story is a real homebody so far. Robert the Bruce famously went before the armies at Bannockburn and, in light armour with only a handaxe, beat a fully armored knight charging at him with a lance by dodging his lance and splitting his helmet in one blow. We'd never get to that decision, would we? We're actually a much less worthy knight than most in history.
Kaian can radio the Duke, I guess. This is a modern army. We're a "unit" with a "sergeant" that goes to a "frontline" so we can just radio in an arty barrage if things get hairy.