Haven't seen a thread like this in here and would like to clear up any questions that folks make have now or in the future. A lot of XJ people ask about doorless laws and others about bumper height, number of auxilary lights, and such. This is what I've found and my interpretation of the law.
The thought of federal law supercedeing state law came up. I do not know what and how this affects things, so take what I say with a grain of salt.
All information is from this in.gov website. >> http://www.in.gov/legislative/ic/2010/title9/
Are doors required? - It doesn't say that they are, but an interpretation of the Chap 7 Sec 1 could say otherwise. The doors would likely be considered mechanical. I haven't heard of many issues around here with that, but it could come up. Please wear your seat belt if you go doorless. You could fall out for gods sake!
Are side view mirrors required? - Doesn't seem to be the case. Looks like the rear view, windshield mounted mirror is what is required. If you can see 200+ feet behind you at all times, you should be good. This might be an issue with certain tire carriers.
What's the max bumper height? - According to Chap 4 Sec 1, the bumper height can vary no more than 3 inches in either direction, regardless of tire, lift, or bumper design from original equipment measurements. That said, I see many trucks that are obviously not in compliance with this, so again, it's up to the police officer to make that call.
How high can my headlamps be? - They must be within 24-54 inches off of the ground, as measured from the center of the lamp. You'd probably get nicked for the bumper height before headlamp height.
How many fog lamps can I have? - 2 which is the max. They must be between 12-30 inches from the ground and aimed so that when the vehicle is unloaded, the high intensity part of the beam that is left of center must shine, at a distance of 25 feet, 4 inches below the the center line of the lamp. Fog lamps can be used in conjunction with low beam headlamps, as long as they are in compliance.
How many spot lamps can I have? 2. The high intensity part of the beam must not extend past 100 feet in front of the vehicle nor can it shine to the line that is extreme left of the vehicle.
How many aux. driving lamps can I have? 1. It must be within 16-42 inches from the ground and follow the same rules as headlamps, in terms of light distribution and aiming.
This message written 11-15-11.
Note: This is my interpretation of what the law says. If you get a citation because of something that is mentioned in here, I'm not responsible. If you print out the law sections which may apply to the modifications on your Jeep, it may help your case, if you do get pulled over.
If anything in here looks incorrect, let me know and I'll see if I agree with you.
Hope this helps...