After a second confirmatory test of the reactor equine, the animal must be either:
(1) euthanized;
(2) identified and sold to slaughter or research, or
(3) permanently isolated not less than two hundred yards from other unaffected horses. If the owner of the reactor equine chooses to have the animal "permanently isolated not less than two hundred yards from other unaffected horses", the reactor must be permanently identified with a visible freeze brand (or other visible brand at the discretion of the administering accredited veterinarian) on the hip or neck of the reactor horse in a manner as specified by regulation promulgated under this chapter.