[JandC]

I can tell you from experience that one state can not enforce another state's registration laws. I am basing this on my 32 years in Law Enforcement, the last 22 of which were with the Illinois State Police. Now if you drive across another state without any valid registration at all, then yes, the state you are traveling through can cite that violation because they require any vehicles in their state to have registration. However, if your state only issues one plate then another state can not fine you for not having two. Just like if your state allows you to have tinted windows and you drive through a state that does not allow it, they can't cite your because you are registered in another state. I would just call the prosecutor and I am pretty sure he/she would dismiss this citation. Sounds like a bad cop writing a bad ticket to me.