As used in this article: (1) "Fleet" means fifty or more marked private passenger motor vehicles or property carrying vehicles with empty weight of not more than twenty-two thousand pounds and a gross vehicle weight of not more than twenty-six thousand pounds, owned or long-term leased by a corporation or other legal entity, and registered in this State pursuant to this article. A rental company as defined in Section 56-31-20 is not required to have marked vehicles as a part of the "fleet" definition. (2) "Marked vehicle" means a vehicle with a name, trademark, or logo located either on the sides or the rear of the vehicle in sharp contrast to the background and of a size, shape, and color that is legible during daylight hours from a distance of fifty feet.