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Investigatory Powers Act 2016 (c. 25)
Part 6 — Bulk warrants
Chapter 2 — Bulk acquisition warrants
(b)
the person to whom the warrant is addressed must, so far as is
reasonably practicable, secure that anything in the process of being
done under the warrant by virtue of that modification stops as soon as
possible,
and section 165(4) does not apply in relation to the refusal to approve the
decision.
(5)
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Nothing in this section affects the lawfulness of—
(a) anything done under the warrant by virtue of the modification before
the modification ceases to have effect,
(b) if anything is in the process of being done under the warrant by virtue
of the modification when the modification ceases to have effect—
(i) anything done before that thing could be stopped, or
(ii) anything done which it is not reasonably practicable to stop.
Cancellation of warrants
(1)
The Secretary of State, or a senior official acting on behalf of the Secretary of
State, may cancel a bulk acquisition warrant at any time.
(2)
If the Secretary of State, or a senior official acting on behalf of the Secretary of
State, considers that any of the cancellation conditions are met in relation to a
bulk acquisition warrant, the person must cancel the warrant.
(3)
The cancellation conditions are—
(a) that the warrant is no longer necessary in the interests of national
security,
(b) that the conduct authorised by the warrant is no longer proportionate
to what is sought to be achieved by that conduct,
(c) that the examination of communications data obtained under the
warrant is no longer necessary for any of the specified operational
purposes (see section 161).
(4)
But the condition in subsection (3)(a) does not apply where the warrant has
been modified so that it no longer authorises or requires the carrying out of
activities falling within section 158(6)(a).
(5)
Where a warrant is cancelled under this section, the person to whom the
warrant was addressed must, so far as is reasonably practicable, secure that
anything in the process of being done under the warrant stops as soon as
possible.
(6)
A warrant that has been cancelled under this section may not be renewed.
Implementation of warrants
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(1)
Implementation of warrants
In giving effect to a bulk acquisition warrant, the person to whom it is
addressed (“the implementing authority”) may (in addition to acting alone) act
through, or together with, such other persons as the implementing authority
may require (whether under subsection (2) or otherwise) to provide the
authority with assistance in giving effect to the warrant.