AR.177B(2) is the list of specified substances and categories of substances for the purposes of the out-of-competition testing rule AR.177B in thoroughbred horse racing. These substances are considered to have no place for use in racehorses, and their detection in a sample taken from a racehorse at any time, including out-of-competition, or their discovery in a racing stable are considered serious offences, with penalties of mandatory disqualification for any person found to have administered, attempted to administer or was a party to the administration of these substances.