Act No. 13, 2003 MEDICINES AND RELATED SUBSTANCES CONTROL ACT, 2003 (a) the Council may issue a permit in the prescribed form and manner to a person to manufacture or pack and sell a specified Schedule 4 substance; (b) the Permanent Secretary may issue a permit in the prescribed form and manner to the person to import or export a specified Schedule 4 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 4 substance can be extracted or manufactured. (24) The Permanent Secretary or the Council, as the case may be, may cancel a permit issued in terms of subsection (23) at any time, if any condition on which the permit was issued is not met. (25) A permit referred to in subsection (23)(c) is valid for such period, not exceeding 12 months from the date of issue, as the Council may determine. (26) A person, who may sell Schedule 4 substances under subsection (19), must keep a register of Schedule 4 substances in the prescribed manner and must balance the register against physical stock at least quarterly. (27) Subject to subsection (29), a person may not ­ (a) manufacture, acquire, possess, use or supply a Schedule 5 substance, unless he or she has been issued with a permit by the Council, subject to conditions determined by the Council; or (b) cultivate, collect, acquire, possess, use or supply a plant, or a portion of a plant, from which a Schedule 5 substance can be extracted or manufactured, unless he or she has been issued with a permit by the Council, subject to conditions determined by the Council, authorising him or her to cultivate, collect, acquire, possess, use or supply such a plant or portion of a plant. (28) The permit referred to in subsection (27) is valid for such period, not exceeding 12 months from the date of issue, as the Council may determine. (29) Notwithstanding subsection (27), the Permanent Secretary may import or acquire a Schedule 5 substance or a plant, or portion of a plant, from which a Schedule 5 substance may be extracted or manufactured, for the purpose of supplying it, on such conditions as he or she may determine, to a medical practitioner, a veterinarian or a scientist for the treatment of a particular patient or such scientific purpose as the Minister, on the recommendation of the Council, may approve. (30) Subject to subsection (31), a pharmacist may sell a greater or a lesser quantity of a Schedule 2 substance than the quantity specified in a prescription or order, according to the immediate container of that substance as supplied to the pharmacist. (31) Notwithstanding subsection (30), the quantity of a Schedule 2 substance sold in terms of that subsection may not deviate by more than twenty-five percent of the quantity specified in the prescription or order in question. (32) A person in possession of a Schedule 3 or a Schedule 4 substance, or in possession of a prescription for a Schedule 3 or a Schedule 4 substance, may not, during the period that he or she is in possession of that substance or during the period covered by that prescription, knowingly obtain from another authorised prescriber another such prescription, unless that person first discloses to that authorised prescriber the possession of the substance or the existence of the prior prescription.