I qualify in all events in Level One competition as a rider, but can not complete in that division due to my sole horse is a stallion. I've owned stallions all my life and have stood multiple AQHA and APHA stallions. I could understand the reasoning behind a "beginner" riding a stallion. However being a beginner level at showing does not equate to a beginner rider or horseman. Maybe a way around that to verify the rider has the experience of handling a stallion is possibly stallion also enrolled in Horseback Riding Program with x amount of current hours or handlers previous experience verified with stallion breeder reports, or declare Level One Stallion Evaluation when shown in an Open or Amature class for the judge to evelulate handler's ability with their stallion.