Part 3: Authorisations for obtaining communications data Section 65: Duration and cancellation of authorisations and notices
This section limits the duration of authorisations and sets out when they must be cancelled. Subsection (1) provides that an authorisation ceases to have effect at the end of the period of one month beginning from the date it was granted.
	Subsections (2) and (3) permit an authorisation to be renewed at any period during the month, by following the same procedure as for obtaining a fresh authorisation. The renewed authorisation will last for a period of one month from the date the current authorisation expires.
	Subsection (4) places a duty on the designated senior officer who has granted an authorisation to cancel it if they are satisfied that the authorisation is no longer necessary or proportionate.
	Subsections (5) and (6) permit the Secretary of State to specify by regulations the person required to carry out the duty set out in subsection (4) in the event that this would otherwise fall on a person who is no longer available to perform it - for example because the specified rank has ceased to exist.