A “farm trailer” is either of the following:
(a) A trailer or semitrailer owned and operated by a farmer in the conduct of agricultural operations, and used exclusively to transport agricultural products upon the highway to the point of first handling and return.
(b) A trailer or semitrailer equipped with rollers on the bed, with a frame not taller than 10 inches high, and with a gross vehicle weight rating of 10,000 pounds or less, that is owned, rented, or leased by a farmer and operated by that farmer in the conduct of agricultural operations, used exclusively to transport fruit and vegetables upon the highway to the point of first handling and return, and that was manufactured and in use prior to January 1, 1997. These vehicles may also be operated on the highways without a load for the purposes of delivering a rented or leased vehicle to the renting or leasing farmer’s farm, or returning empty to the owner’s premises.