(a) if an official form is prescribed and issued by the Governor General under the foregoing regulation, a prescription for any of the drugs shall only be dispensed if the prescription is on one of those forms, or in the case of an emergency prescription given under the conditions specified in the foregoing regulation, if the person dispensing the prescription is acquainted with the signature of the medical practitioner, dentist, or veterinary surgeon by whom the prescription purports to be given, or is acquainted with the person for whose use the prescription is given and has no reason to suppose that the prescription is not genuine; if an official form is not prescribed, a prescription for any of the drugs shall only be dispensed if either—
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(i) the person dispensing the prescription is acquainted with the signature of the medical practitioner, dentist, or veterinary surgeon by whom the prescription purports to 'be given and has no reason to suppose the prescription is not genuine, or
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(ii) the person dispensing the prescription has taken reasonably sufficient steps to satisfy himself or herself that the prescription is genuine;