If you search the archives on nasioc you can probably find the response I got from the Maryland MVA after I got my ticket. You can lose your license and the fine can go as high as $10K. They have a bunch of little requirements that you have to meet like the hazmat stickers on your vehicle and all that crap. By disconnected they literally mean no lines running to the bottle and not just having the valve on the bottle closed. Contact your DMV/MVA in your state and they will tell you exactly what the law is and before you try to figure it out yourself make sure to ask a lawyer and not some asshole from the shop who sold it to you like I did. I removed the system and turned it over to the court, still paid a small fine but a trooper friend of mine knew the cop who issued the ticket and talked to him so come court time he was OK with me just paying a small fine and handing over the nitrous kit.