(

a) The limitations as to width as set forth in

Chapter 2 (commencing with

Section 35100) of Division do not apply to implements of husbandry incidentally operated, transported, towed, or otherwise moved over a highway. (

b) Notwithstanding subdivision (a), when an implement of husbandry is transported or moved over a highway which is a part of the National System of Interstate and Defense Highways (as referred to in

Section of the Federal-aid Highway Act of 1956) as a load on another vehicle, if the load exceeds inches in width, the vehicle and load shall not be operated for a distance in excess of miles from the point of origin of the trip. The operator of the transporting vehicle shall be a farmer or a person regularly employed by a farmer or farm corporation, and the operator transporting the load shall have in his or her immediate possession a writing signed by the farmer or farm corporation agent which states the origin and destination of the trip. (

c) Notwithstanding subdivision (a), when an implement of husbandry is transported or moved over any other highway as a load on another vehicle, if the load exceeds inches in width, the vehicle and load shall not be operated for a distance in excess of miles from the point of origin of the trip. The operator of the transporting vehicle shall be a farmer or a person employed by a farmer or farm corporation, and the operator transporting the load shall have in his or her immediate possession a writing signed by the farmer or farm corporation agent which states the origin and destination of the trip.