(1)  A licence or authority has effect until the date specified in it, unless it is renewed or cancelled.

(2)  Where an application for the renewal of a licence or authority is refused –

(a) that licence or authority continues in force until the expiration of the period ordinarily limited for the bringing of an appeal against that refusal; and

(b) if such an appeal is brought, the licence or authority continues until the final determination or abandonment of that appeal.

(3)  A licence issued to a person to carry on business as a manufacturing chemist ceases to have effect upon that person ceasing to be a qualified person.

(4)  A licence to grow a prohibited plant issued under section 52 of the Act in a certain year ceases to have effect on 31 December in the following year.