I would definitly go to trial for this. My defense would be to challenge the voracity of wether your vehicle is applicable to the Federal Motor Vehicle Safety Standard 208. This standard is quite lengthy and requires a team of scientists just to make a dent into it.
DO NOT challenge the officers statement of wether you were wearing your seatbelt or not. You will lose that one hands down. Feel free to challenge any knowledge he has to Federal Motor Vehicle Safety Standard 208 though. The burden of proof as to wether your vehicle requires a seatbelt rests solely then on the prosecution. I highly doubt the prosecution has an expert witness to debunct your claim.
Research you state code for the exact wording on the seat belt law. If you find anything in it like ---
(b) Each occupant of the front seat of a passenger vehicle shall, while such passenger vehicle is being operated on a public road, street, or highway of this state, be restrained by a seat safety belt approved under Federal Motor Vehicle Safety Standard 208.
(c) The requirement of subsection (b) of this Code section shall not apply to:
(1) A driver or passenger frequently stopping and leaving the vehicle or delivering property from the vehicle, if the speed of the vehicle between stops does not exceed 15 miles per hour;
(2) A driver or passenger possessing a written statement from a physician that such person is unable, for medical or physical reasons, to wear a seat safety belt;
(3) A driver or passenger possessing an official certificate or license endorsement issued by the appropriate agency in another state or country indicating that the driver is unable for medical, physical, or other valid reasons to wear a seat safety belt;
(4) A driver operating a passenger vehicle in reverse;
(5) A passenger vehicle with a model year prior to 1965;
(6) A passenger vehicle which is not required to be equipped with seat safety belts under federal law;
(7) A passenger vehicle operated by a rural letter carrier of the United States Postal Service while performing duties as a rural letter carrier;
(8) A passenger vehicle from which a person is delivering newspapers; or
(9) A passenger vehicle performing an emergency service.
I would utilize subsection C. line (6) --
(6) A passenger vehicle which is not required to be equipped with seat safety belts under federal law;
Let them Prove that your vehicle NEEDS a safety belt.


. The burden of proof as to wether your vehicle requires a seatbelt rests solely then on the prosecution. I highly doubt the prosecution has an expert witness to debunct your claim.

