Section 341.32 - Vehicle to be reregistered if subject to a different fee(1) Whenever the construction or the use of a registered vehicle is changed in a manner making the vehicle subject to a different registration fee than the fee for which the vehicle currently is registered, the owner shall immediately make application for reregistration. The fee payable upon such reregistration shall be computed as for a vehicle not previously registered in this state but a credit shall be allowed for the unused portion of the fee paid for the previous registration if the registration plates issued upon the previous registration are returned to the department. The credit shall be computed on the basis of one-twelfth of the annual registration fee or one twenty-fourth of the biennial registration fee prescribed for the vehicle as previously registered multiplied by the number of months of registration which have not fully expired on the date the vehicle became subject to the different fee. The credit may be applied toward the reregistration of the vehicle only up to the date when the previous registration would have expired.(2) Whenever the owner or other person responsible for registration of a vehicle required to be registered on the basis of gross weight desires to carry a greater load than that permitted under the current registration of such vehicle, he or she shall make application for reregistration of the vehicle at a higher gross weight. Whenever such person is convicted of carrying a greater load than that permitted under his or her current registration, the court, in addition to imposing the penalty prescribed by law, shall order such person to make application for reregistration of the vehicle at a gross weight sufficiently high to cover the load which he or she was convicted of carrying. The fee payable upon reregistration shall be computed on the basis of one-twelfth of the difference between the annual fee prescribed for the vehicle as previously registered and the annual fee prescribed for the vehicle as reregistered or one twenty-fourth of the difference between the biennial fee prescribed for the vehicle as previously registered and the biennial fee prescribed for the vehicle as reregistered, multiplied by the number of months of the quarter or year for which the vehicle is being reregistered which had not fully expired when the vehicle became subject to the higher fee. This subsection does not apply under the circumstances stated in sub. (3).(3) A motor truck with a registered gross weight of 10,000 pounds or less and loaded exclusively with fluid milk or cream may, during the months of May, June and July, carry from the point of production of such milk to the primary market therefor 1,500 pounds or less in excess of the gross weight for which such motor truck is registered without a reregistration of such motor truck on account of such excess loading.1977 c. 29 ss. 1443, 1654 (7) (a); 1989 a. 31.