"He has refused to recruit a unit," -> unit recruitment + class are also protected under inalienable rights.
If the banned noble was a priest, then it would be an IR violation to order him to recruit a unit. Otherwise, it is perfectly fine to order someone to recruit "A" unit, as long as you don't tell them to recruit infantry or archers or half-orc bards (Outer Tilog players, I want you to create a recruitment center called the half-orc bards).
