(a) No horse participating in a race shall carry in its body any drug substance or its metabolites or analogues, foreign to the horse except as hereinafter expressly provided.

(b) No drug substance shall be administered to a horse which is entered to compete in a race to be run in this State except for approved and authorized drug substances as provided in these rules.

(c) No person other than a licensed veterinarian or animal health technician shall have in his/her possession any drug substance which can be administered to a horse, except such drug substance prescribed by a licensed veterinarian for a specific existing condition of a horse and which is properly labelled.

(d) A finding by an official chemist that a test sample taken from a horse contains a drug substance or its metabolites or analogues which has not been approved by the Board, or a finding of more than one approved non-steroidal, anti-inflammatory drug substance, or a finding of a drug substance in excess of the limit established by the Board for its use shall be prima facie evidence that the trainer and his/her agents responsible for the care of the horse has/have been negligent in the care of the horse and is prima facie evidence that the drug substance has been administered to the horse.

(e) Nothing in this Article shall prevent a racing association or fair from setting eligibility conditions, as agreed to with the acknowledged horsemen's organization(s), for individual races, or for its entire race meet, that prohibit the use and/or presence of drug substances or medications in biological test samples collected from participating horses at detection levels lower than what is authorized by the Board. Such conditions, if established in accordance with Rule 1581, shall not be deemed in conflict with the rules and regulations of the Board.