As used in this chapter unless the context otherwise requires:

1.    “Identifying number” means the vehicle identification numbers and letters if any assigned by the manufacturer or by the department for the purpose of identifying a vehicle. The term includes any numbers or letters assigned by the manufacturer for the purpose of identifying a part of a vehicle or any number placed on a part in accordance with this chapter or rules of the department for the purpose of identifying the vehicle.

2.    “Unconventional vehicle” means a motor vehicle that is designed to travel on at least three wheels in contact with the ground, has an unladen weight of at least three hundred pounds [136.08 kilograms] but less than eight thousand pounds [3628.7 kilograms], has a permanent upright seat that does not require the operator to straddle or sit astride it, has a steering device for front wheel steering control, is capable of speeds in excess of sixty-five miles [104.61 kilometers] per hour, complies with equipment listed in chapter 39-21 or 39-27, as appropriate, and has an identifying number. The term does not include motor vehicles that otherwise may be registered under this title.