C-72.1, r. 4 - Rules respecting Standardbred horse races held at a professional race track

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51. Where the veterinarian administers to a horse a drug, a medication or any other substance which may yield positive results when analyzed or where he recommends that such drug, medication or substance be administered to a horse, he shall indicate to the trainer of the horse, as the case may be:
(1)  the quantity of drug, medication or substance administered;
(2)  the quantity of drug, medication or substance to be administered;
(3)  the period of time during which the taking of an official sample of the drug, medication or substance administered or to be administered is likely to yield positive results.
Decision 90-09-19, s. 51.