Mississippi Code Title 63. Motor Vehicles and Traffic Regulations § 63-5-52

(1) In addition to other permits authorized to be issued for overweight loads, the Department of Transportation is authorized to issue annual special permits for vehicles transporting heavy equipment with a nondivisible load having a gross vehicle weight of one hundred fifty thousand (150,000) pounds or less. The permit shall be issued for the pulling unit. The department may establish rules and regulations for the issuance and transference of the permit from one pulling unit to another. The fee for such permit shall be Four Thousand Five Hundred Dollars ($4,500.00) and the permit shall expire one (1) year from the beginning movement date. Movements under such permit shall be made under such safety and equipment restrictions as the department may establish. The department shall specify the routes over which such movements may be conducted.

(2) In addition to other permits to be used for overweight and oversized loads, the Department of Transportation is authorized to issue annual special permits for the transporting of forestry-related equipment to vehicles having a gross vehicle weight of not more than one hundred thousand (100,000) pounds and dimensions of not more than fourteen (14) feet wide and fourteen (14) feet high. The permit, to be referred to as the “Forestry Permit,” shall be issued for each vehicle that serves as a pulling unit, at a fee of Two Hundred Dollars ($200.00) per unit annually. The Forestry Permit shall be available for the hauling of equipment or machinery customary and necessary for timber-harvesting activities, including, but not limited to, bulldozers, knuckleboom loaders, cutters, skidders, track machines of the same kind, mulchers and other machines used for silvicultural activities. The Forestry Permit shall be available to those hauling the subject equipment to and from timber harvest operations, as well as those hauling the equipment to and from a truck repair shop or equipment service center.