“(1) A medical practitioner or nurse practitioner who signs a prescription for a Class A controlled drug or a Class B controlled drug may direct on the prescription that the drug be supplied on 2 occasions at a specified interval, with—
“(2) In the case of a controlled drug supplied pursuant to a direction under subclause (1), the total quantity supplied, having regard to the dose and frequency of dose or the directions of the medical practitioner or nurse practitioner, must not be greater than a quantity sufficient for use for a period of 1 month.
“(3) A medical practitioner or nurse practitioner who signs a prescription for a Class C controlled drug may direct on the prescription that the drug be supplied on not more than 3 occasions, which, unless specified otherwise, are to be at monthly intervals.
“(4) In the case of a controlled drug supplied pursuant to a direction under subclause (3), the total quantity supplied, having regard to the dose and frequency of dose or the directions of the medical practitioner or nurse practitioner, must not be greater than a quantity sufficient for use for a period of 3 months.
“(5) A midwife who signs a prescription for a controlled drug specified in Schedule 1C may direct on the prescription that the drug be supplied on 2 occasions at a specified interval, with—
“(6) In the case of a controlled drug supplied pursuant to a direction under subclause (5), the total quantity supplied, having regard to the dose and frequency of dose or the directions of the midwife, must not be greater than a quantity sufficient for use for a period of 1 month.
“(7) If, for special reasons relating to the protection of the patient, or for the purpose of limiting the quantity of any controlled drug in the possession of any person, the controlled drug prescriber (not being a dentist or veterinarian) who signs a prescription directs on the prescription that the controlled drug is to be dispensed daily or at such other regular intervals as the controlled drug prescriber considers necessary for a specified period not exceeding 1 month, the controlled drug may be supplied on not more than the number of occasions indicated, and not more frequently than the intervals directed.
“(8) If a Medical Officer of Health has issued to a person a notice under section 25 of the Act that authorises him or her to supply a controlled drug for a restricted person on more than 2 occasions on any prescription, that person may supply the controlled drug in such quantity, at such frequency, and for such period as the notice specifies.”