It shall be unlawful to operate in this state any truck or truck tractor having an owner declared gross weight of 43,000 or more pounds which does not comply with the name display requirements of this Code section. Each such truck or truck tractor shall have displayed on each side thereof the name and principal place of domicile of the registered owner or, if the truck or truck tractor is operating under a lease arrangement, the name and principal place of domicile of the lessee, except that trucks and truck tractors operating pursuant to authority granted by the commissioner of motor vehicle safety under Chapter 7 of Title 46 or the federal Interstate Commerce Commission shall display the name of the holder of such authority and such other information as may be required by those authorities. The display shall be in sharp color contrast to the background and shall be of such size, color, and shape as to be readily legible during daylight hours from a distance of 50 feet while the vehicle is not in motion; and such display shall be maintained in a manner so as to remain so legible. This Code section shall not prohibit the display of additional information which does not interfere with the legibility of the display required by this Code section.