Kan. Stat. § 8-141a
The owner of any truck or truck tractor with local, farm or 6,000-mile class of registration, who desires to transfer or change the classification of registration at any time during the calendar year in which the registration is issued may transfer the registration only to the type of registration provided for in the first paragraph of subsection (2) of K.S.A. 8-143. Such transfer of class of registration shall be for no less gross weight than the gross weight for which the vehicle was originally registered. The owner of a truck or truck tractor registered as provided for in the first paragraph of subsection (2) of K.S.A. 8-143, may not transfer or change such registration to a farm, local or 6,000-mile class of registration during the calendar year in which the original registration is issued.
K.S.A. 8-141a