Actually I have to reword the Pinto registry. It is PtHA for Pinto Horse Association of America.
Wording of Paint horse regulations:
Horses accepted for registration in the APHA result from these combinations only: Paint x Paint, Paint x QH, Paint x TB, QH x QH, TB x TB, or QH x TB. Purebred Quarter Horses or Thoroughbreds are welcomed into the APHA registry as long as the horses have enough white to meet minimum color requirements.
Wording of Pinto horse association:while the PtHA allows registration of spotted horses and ponies of many breeds