Every motor vehicle licensed under KRS 186.050(3) through (14) shall display all plates issued by the county clerk. Except as provided in KRS 186.045, the registration receipt shall be kept in the truck at all times and shall be available for inspection.
Display of plates by commercial vehicles -- Registration to be kept in truck
KRS § 189.260, under TRAFFIC REGULATIONS -- VEHICLE EQUIPMENT AND STORAGE.
KRS § 189.260