the thing that I don't understand is that when I asked where in the ORC (Ohio Revised Code) the regulations for that kind of thing can be found, for things like a 'spin knob,' I got answers like, " A spin knob is the knobby-thing that goes on the steering wheel. You NEED to have one." You know.....government stuff/talk. Different answer from each person, but just as irrelevant.
Huh? That's not technical-speak.
Eyeglasses are pretty much self-explanatory, but that kind of reply doesn't answer questions like, "What is it design-wise?" "How is it properly installed?" "How/when are you supposed to use it." Knowing how it's properly designed & installed ensures you don't get junk or a shoddy installation from some jerk at a customizing shop who just wants bags of money from you because you have no other option than to get one. Knowing how/ when to use it makes you a better, safer driver. The only (good) thing is that automakers, like Ford, will give you up to $1000 to add stuff to your car, IF you can prove you need it, with documents from therapists/doctors.
I guess the only way to find out is to go out and 'break the law, and get caught'. Then an officer has to put on the citation which codes were violated, and I could finally look them up.
Maybe we have a law-oriented person here who could help pin things down.