This post is a couple months old, and you may already be up here, or have your answers. but I will add my two cents.
I have had lifted my trucks my whole driving career! My first lifted vehicle was a '97 dodge 1500 with 7" of lift and 36x14.5 parnelli jones dirt grips. The cops here in Bis had a ball with me, so I got to know the law books very well!
There is a bumper height of 27", However, most cops will insist on measuring the highest point on the bottem edge of both bumpers! Suplemental bumpers are legal, but have to have structural integrity, and be attached to the frame! Also, they will pull you over for not having mud flaps and you will get a ticket! I forget exactly how its stated, but something about your quarter panels being higher than the centerline of your axles, will then require mud flaps. Tires sticking out beyond fenders will also net you a ticket! they dont need to stick out too far either, basically any tread will get you pulled over. There is also a cargo area height, 40 some inches if I rember right. No suspension lifts over 4" and no body lifts over 3". and NO modification to the stock steering is legal! However, you would have to be pulled over by a jeep "savy" cop for him/her to notice this.
As said, most will leave you alone, especially in the rural comunities (i.e. Tioga!). However, most will use it as a reason to pull you over for larger issues such as DUI. But it seems they get angered when you pass the "road side olympics", and will then throw the book at you for your vehicle mods!
I have 6 equipment violations during my 14 years driving, so they dont have a lot of forgiveness for me anymore! However, most do seem to appreciate the fact that all of my mods are high quality and very safe!
I have not had any issues with my JK, however, one cop I recently passed was eye f@*cking the shit out of my jeep, and that has me concerned! I shouldnt even mention it since its probably bad karma, but he may have a meeting with me in mind the next time he passes me!
Sorry for the long post, but wanted to fill you in! Good luck with your jeep. There are TONS of HUGE trucks up in the oil patch from other states, and I have a feeling the cops/sherrifs/and state patrols have their hands full with bigger issues (Illegal alliens, drivers with no CDL's, drunks, overloaded trucks, etc, etc!). It is booming up there big time, be safe, and enjoy ND!