(a) Operating a tractor of over 20 power-take-off (PTO) horsepower, or connecting or disconnecting an implement or any of its parts to or from such a tractor.

(b) Operating or assisting to operate (including starting, stopping, adjusting, feeding, or any other activity involving physical contact associated with the operation) any of the following machines:

(c) Operating or assisting to operate (including starting, stopping, adjusting, feeding, or any other activity involving physical contact associated with the operation) any of the following machines:

(d) Working on a farm in a yard, pen, or stall occupied by a:

(e) Felling, bucking, skidding, loading, or unloading timber with butt diameter of more than six inches.

(f) Working from a ladder or scaffold (painting, repairing, or building structures, pruning trees, picking fruit, etc.) at a height of over 20 feet.

(g) Driving a bus, truck, or automobile when transporting passengers, or riding on a tractor as a passenger or helper.

(h) Working inside:

(i) Handling or applying (including cleaning or decontaminating equipment, disposal or return of empty containers, or serving as a flagperson for aircraft applying) agricultural chemicals classified under the Federal Insecticide, Fungicide, and Rodenticide Act (7 U.S.C. 135 et seq.) as Category I of toxicity, identified by the word “poison” and the “skull and crossbones” on the label; or Category II of toxicity, identified by the word “warning” on the label.

(j) Handling or using a blasting agent, including but not limited to, dynamite, black powder, sensitized ammonium nitrate, blasting caps, and primer cord.

(k) Transporting, transferring, or applying anhydrous ammonia.