Your May 18 letter to Mr. Jim Knorpp, the Occupational Safety and Health Administration (OSHA) Area Director for Fort Worth, was forwarded to this office for response. I apologize for the delay in replying to your inquiry as to OSHA's interpretations of the terms certified and qualified as used in ANSI standards for aerial lifts.
Pole bending. Pole bending is a timed event that features a horse and one mounted rider, running a weaving or serpentine path around six poles arranged in a line.
Then you have 9ft/canter poles set up for your horse's length of stride/stage of schooling, and you can walk trot or canter over them safely. If you want trot poles just add a pole mid way between, but remember you can only trot over trot poles, not walk or canter.