(21) "Private commercial and noncommercial carrier of property by motor vehicle" means any person not included in the terms "common carrier by motor vehicle" or "contract carrier by motor vehicle," who or which transports in interstate or intrastate commerce on the public highways of this state by motor vehicle, property of which such person is the owner, lessee, or bailee, other than for hire. The term "private commercial and noncommercial carrier of private property by motor vehicle" shall not include passenger buses operated wholly within the corporate limits of a municipality of this state, or not exceeding five (5) miles beyond the corporate limits of the municipality, and hearses, ambulances, and school buses as such. In addition, this definition shall not include taxicabs. Haulers of fertilizer shall be classified as private commercial carriers of property by motor vehicle.