FMCSA 383.5
Commercial motor vehicle (CMV) means a motor vehicle or combination of motor vehicles used in commerce to transport passengers or property if the motor vehicle is a—
(1) Combination Vehicle (Group A)—having a gross combination weight rating or gross combination weight of 11,794 kilograms or more (26,001 pounds or more), whichever is greater, inclusive of a towed unit(s) with a gross vehicle weight rating or gross vehicle weight of more than 4,536 kilograms (10,000 pounds), whichever is greater; or
FMCSA 383.3
(d) Exception for farmers, firefighters, emergency response vehicle drivers, and drivers removing snow and ice. A State may, at its discretion, exempt individuals identified in paragraphs (d)(1), (d)(2), and (d)(3) of this section from the requirements of this part. The use of this waiver is limited to the driver's home State unless there is a reciprocity agreement with adjoining States.
(1) Operators of a farm vehicle which is:
(i) Controlled and operated by a farmer, including operation by employees or family members;
(ii) Used to transport either agricultural products, farm machinery, farm supplies, or both to or from a farm;
(iii) Not used in the operations of a for-hire motor carrier, except for an exempt motor carrier as defined in §390.5 of this subchapter; and
(iv) Used within 241 kilometers (150 miles) of the farmer's farm.
TN Commercial Drivers License
Some drivers may require an A/57 license. This license applies to drivers who do not require a class A license, but who haul an excess of 10,001 pounds or more. Examples are: F450 pick-up truck hauling a 10,001 or more pound trailer, an electric department truck hauling a 10,000 pound forklift on a flatbed trailer, etc.