(a) Trainers are responsible for the condition all horses trained by them.
(b) No trainer may start or permit a horse under the trainer’s custody, care or control to start or to be started, if the trainer knows or has cause to believe that the horse has be administered a prohibited drug or other restricted substance that could in a positive test.
(c) The trainer must be held responsible for a positive test, unless the trainer can show by substantial evidence that neither the trainer, an employer, nor an agent was responsible for administering the drug or other restricted substance.
(d) Trainers shall guard each horse trained by them in such a manner and for such period before racing the horse to prevent any person, whether the person is connected with or employed by the owner or trainer, from administering a prohibited drug or other restricted substance to the horse.
(e) Trainers shall maintain accurate records of all corticosteroid joint injections to horses trained by them. The record of every corticosteroid injection must be submitted within 48 hours of the injection to the Commission in a form and manner approved by the Commission. A trainer may delegate the responsibility for reporting to the attending veterinarian. The report must be accessible to the examining veterinarian to assist with pre-race veterinarian examinations.