23. Restrictions on possession of prescription medicines---Section 43
 (2) of the Medicines Act 1981 is hereby amended by repealing paragraph
 (c), and substituting the following paragraph:
   ``(c) A person to whom the medicine has been lawfully supplied for his
          or her use, or for use by any other person, as a patient under
          the care of a practitioner or registered midwife and who does
          not have in his or her possession any other supplies of a
          prescription medicine prescribed or supplied for the same
          purpose by another practitioner or registered midwife, and is
          necessary or incidental to such use; or''.