Act No. 13, 2003 MEDICINES AND RELATED SUBSTANCES CONTROL ACT, 2003 (b) the Permanent Secretary may issue a permit in the prescribed form and manner to the person to import or export a specified Schedule 3 substance; (c) the Council may issue a permit in the prescribed form and manner to the person to cultivate or collect a plant, or a portion of a plant, from which a specified Schedule 3 substance can be extracted or manufactured. (16) The Permanent Secretary or the Council, as the case may be, may issue a permit referred to in subsection (15), if the Permanent Secretary or the Council is satisfied that the substance or plant in question is reasonably required for the treatment of a patient or in the public interest. (17) The Permanent Secretary or the Council, as the case may be, may cancel a permit issued in terms of subsection (15) at any time, if any condition on which the permit was issued is not met. (18) The permit referred to in subsection (15)(c) is valid for such period, not exceeding 12 months from the date of issue, as the Council may determine. (19) A person, other than the following, may not sell a Schedule 4 substance: (a) (b) a pharmacist, or a pharmacist intern acting under the personal supervision of a pharmacist, on a written prescription, which is not older than 14 days, issued by an authorised prescriber, or, in an emergency, on an oral instruction from an authorised prescriber, who is known to the pharmacist, and taken and reduced to writing by the pharmacist concerned: Provided that ­ (i) within 72 hours after giving the oral instruction, the authorised prescriber concerned furnishes the pharmacist with a written prescription confirming that instruction, and the period of treatment on the oral instruction does not exceed 48 hours; and (ii) the exact quantity on the prescription is sold; a medical practitioner, a dentist or a veterinarian, who holds a licence contemplated in section 31(3), subject to the conditions of that licence. (20) A person who sells a Schedule 4 substance must record the prescribed particulars of every sale of that substance ­ (a) in the register of Schedule 4 substances, which that person must keep at his or her business premises for not less than three years from the date of the last entry in it; and (b) in a prescription book, or other permanent record, required to be kept in the prescribed manner. (21) A person may not repeat the sale of a Schedule 4 substance on the same prescription, and the period of treatment covered by a prescription referred to in subsection (19) may not exceed 30 days. (22) A seller must retain the prescription referred to in subsection (19)(a) for not less than three years. (23) On application by a person, who may manufacture, pack and sell, import or export scheduled substances under a licence contemplated in section 31(5) ­