All foot throttles must have a toe strap. All exhausts must discharge vertically upward above the highest point of the tractor with the exception of roll bars, and be securely attached. Vertically is defined as being within ten degrees in any direction of being plumb. No rain caps allowed when pulling. Minimum drawbar length is 18 inches from center of rear wheel to point of hook.
Drawbar is to be stationary in all directions.
Maximum height of 20 inches from top of hitching device, parallel to the ground. Drawbar must be rigid in all directions and parallel to the ground. S clevises will not be allowed. No drawbar supports above centerline of rear axle will be allowed. All tractors must be equipped with workable rear wheel brakes.