170.This section specifies the way in which authorisations and notices must be completed and their duration.
171.Subsections (1) and (2) explain the format which authorisations and notices must take.
172.Subsection (3) restricts the persons to whom the data may be disclosed to the person giving the notice or another specified person who must be from the same relevant public authority.
173.Subsection (4) explains that disclosure may only be required of data in the possession of, or obtained by the communications service provider during the authorisation period of authorisations and notices, which is set at one month.
174.Subsections (5) and (6) permit an authorisation or notice to be renewed at any period during the month, by following the same procedure as in obtaining a fresh authorisation or notice.
175.Subsection (7) explains that the period for which a renewed authorisation or notice is extant begins at the point at which the notice or authorisation it is renewing expires.
176.Subsection (8) requires the cancellation of a notice as soon as it is clear that the reasons for which it was granted are no longer valid.
Commentary on Sections Chapter Ii Section 23: Form and duration of authorisations and notices