Any motor vehicle not having an advertised manufacturer's weight shall pay a license fee based upon the actual weight as determined by the director from satisfactory proofs submitted to the director. Any truck not having a manufacturer's advertised load capacity shall pay a license fee in accordance with the schedules provided in this chapter and applicable thereto upon its load capacity as determined by the director upon satisfactory proofs submitted to the director.
N.D.C.C. § 39-04-24