Veh. Code, § 36005

An implement of husbandry includes, but is not limited to, all of the following:

(a) A lift carrier or other vehicle designed and used exclusively for the lifting and carrying of implements of husbandry or tools used exclusively for the production or harvesting of agricultural products, when operated or moved upon a highway.

(b) A trailer of the tip-bed type when used exclusively in the transportation of other implements of husbandry or tools used exclusively for the production or harvesting of agricultural products.

(c) A trailer or semitrailer having no bed, and designed and used solely for transporting a hay loader or swather.

(d) A spray or fertilizer applicator rig used exclusively for spraying or fertilizing in the conduct of agricultural operations. This subdivision does not apply to anhydrous ammonia fertilizer applicator rigs which have a transportation capacity in excess of 500 gallons.

(e) (1) A trailer or semitrailer that has a maximum transportation capacity in excess of 500 gallons, but not more than 1,000 gallons, used exclusively for the transportation and application of anhydrous ammonia, if the vehicle is either equipped with operating brakes or is towed upon a highway by a motortruck that is assigned a manufacturer’s gross vehicle weight rating of3/4 ton or more.

(2) These vehicles are subject to Section 24603 if the stoplamps of the towing vehicle are not clearly visible.

(3) For purposes of this subdivision, a combination of vehicles is limited to two vehicles in tandem.

(f) A nurse rig or equipment auxiliary to the use of and designed or modified for the fueling, repairing, or loading of an applicator rig or an airplane used for the dusting, spraying, fertilizing, or seeding of crops.

(g) A row duster.

(h) A wagon or van used exclusively for carrying products of farming from one part of a farm to another part thereof, or from one farm to another farm, and used solely for agricultural purposes, including any van used in harvesting alfalfa or cotton, which is only incidentally operated or moved on a highway as a trailer.

(i) A wagon or portable house on wheels used solely by shepherds as a permanent residence in connection with sheep raising operations and moved from one part of a ranch to another part thereof or from one ranch to another ranch, which is only incidentally operated or moved on a highway as a trailer.

(j) Notwithstanding subdivision (f) of Section 36101, a trap wagon, as defined in Section 36016, moved from one part of a ranch to another part of the same ranch or from one ranch to another, which is only operated or moved on a highway incidental to agricultural operations. The fuel tank or tanks of the trap wagon shall not exceed 1,000 gallons total capacity.

(k) Any vehicle that is operated upon a highway only for the purpose of transporting agricultural products and is in no event operated along a highway for a total distance greater than one mile from the point of origin of the trip.

(l) A portable honey-extracting trailer or semitrailer.

(m) A fertilizer nurse tank or trailer that is not self-propelled and which is moved unladen on the highway and auxiliary to the use of a spray or fertilizer applicator rig.

(n) Any cotton trailer when used on the highways for the exclusive purpose of transporting cotton from a farm to a cotton gin, and returning the empty trailer to such farm, except that Section 5014 shall apply to such trailers.

(o) A truck tractor or truck tractor and semitrailer combination specified in this subdivision which is owned by a farmer and operated on the highways, (1) only incidental to a farming operation, (2) not for compensation, and (3) for a distance of not more than two miles (on the highway) each way. This subdivision applies only to truck tractors with a manufacturer’s gross vehicle weight rating over 10,000 pounds that are equipped with all-wheel drive and off-highway traction tires on all wheels, and only to semitrailers used in combination with such a truck tractor and exclusively in production or harvesting of tomatoes. The vehicles specified in this subdivision shall not be operated in excess of 25 miles per hour on the highways.

(p) An all-terrain or utility-terrain vehicle used exclusively in agricultural operations.