(a) On a race day on which a horse is scheduled to race, a person may not desensitize any part of the horse's leg by a means other than ice.(b) Except as otherwise provided by this subchapter, a person may not permit a horse to run in a race if the person knows the horse is desensitized at the time the horse arrives in the pre-race holding area.(c) For purposes of this section, desensitize means to create a condition in which a horse's body does not respond appropriately to tests for feeling administered by the commission veterinarian.