For a vehicle that has no legible manufacturer's certification label, the applicant may provide documentation of the gross vehicle weight rating, such as a manufacturer's certificate of origin, a title, a vehicle registration document, or the vehicle identification number information for the vehicle. In the absence of the above documentation, the registered weight of the vehicle shall be presumed to be the gross vehicle weight rating. This rule is intended to implement Iowa Code section 321.1.
Iowa Admin. Code r. 761-604.35