(1) In all cases where a trailer or semitrailer is used for the transportation of property, either as a common carrier, contract carrier, private commercial carrier, private carrier, or otherwise, and is operated in conjunction with, and is drawn by a tractor, or other motor vehicle, the tax upon such motor vehicle, truck tractor or road tractor shall be calculated and levied on the maximum gross weight of such vehicle, and the tax to be levied upon the operator thereof upon each motor vehicle, truck tractor or road tractor drawing a semitrailer or trailer shall be computed in accordance with the foregoing schedules in the proper classification. In such cases, however, the gross weight of the trailer or semitrailer shall be combined with the gross weight of the truck tractor, road tractor or other motor vehicle, and the total gross weight of both vehicles counted as one (1) unit shall be used in determining the tax to be paid under this article. Provided, however, that no tax shall be levied upon any trailer or any farm tractor using the highways solely in hauling or transporting farm products of the soil from the farm to the gin or market, or transporting fertilizer or feed to the farm, where the gross weight does not exceed eight thousand (8,000) pounds, and where the title to such products is still in the producer thereof.

(2) On each trailer, semitrailer, house trailer, house semitrailer, travel trailer, rental trailer or rental semitrailer used with or drawn by any motor vehicle upon the highways of this state there is hereby levied an annual highway privilege tax of Ten Dollars ($10.00). The highway privilege tax levied in this subsection shall not apply to trailers or semitrailers subject to the tax levied in Section 27-19-18.

(3) Before issuing a license for any trailer or semitrailer, the owner thereof shall furnish the commission a serial number for such trailer or semitrailer, and if the same does not bear a serial number, then the commission shall assign to the owner a serial number, to be placed on such trailer or semitrailer. Said serial number shall be stamped or printed on such trailer or semitrailer at some convenient and accessible location and shall be used in making application for and issuing the privilege license for such trailer or semitrailer.

(4) No tax shall be imposed on the wagons or trailers, or the tractors drawing same, of circuses, carnivals, fairs and other shows using municipal streets or public highways, when such wagons or trailers are shipped into the State of Mississippi by railroad, and use such streets and highways only in transporting such trailers, or wagons from the railroad to be placed where such circus, carnival, fair or other show is to be held or staged, and in returning such trailers and wagons from such place to the railroad for reloading.