Interception
of Communications Act 1985
c. 56
5.-(1) The Secretary of State may at any time-
5
Modification
modify a warrant by the insertion of any address which of warrants
etc.
he considers likely to be used as mentioned in section
3(1)(a) above ; or
(b) modify a certificate so as to include in the certified
material any material the examination of which he
considers necessary as mentioned in section 2(2) above.
(2) If at any time the Secretary of State considers that any
address specified in a warrant is no longer likely to be used as
mentioned in section 3(1)(a) above, he shall modify the warrant
by the deletion of that address.
(a)
(3) If at any time the Secretary of State considers that the
material certified by a certificate includes any material the
examination of which is no longer necessary as mentioned in
section 2(2) above, he shall modify the certificate so as to exclude that material from the certified material.
(4) A warrant or certificate shall not be modified under subsection (1) above except by an instrument under the hand of the
Secretary of State or, in an urgent case
(a) under the hand of a person holding office under the
Crown who is expressly authorised by the warrant or
certificate to modify it on the Secretary of State's behalf ;
or
of State has expressly authorised the
modification and a statement of that fact is endorsed on
the instrument, under the hand of such an officer as is
(b) where the Secretary
mentioned in section 4(1)(b) above.
(5) An instrument made under subsection (4)(a) or (b) above
shall cease to have effect at the end of the fifth working day
following the day on which it was issued.
6.-(1) Where the Secretary of State issues a warrant he
shall, Safeguards.
arrangements have already been made, make such
arrangements as he considers necessary for the purpose of
securing(a) that the requirements of subsections (2) and (3) below
are satisfied in relation to the intercepted material ; and
(b) where a certificate is issued in relation to the warrant,
that so much of the intercepted material as is not
certified by the certificate is not read, looked at or
listened to by any person.
(2) The requirements of this subsection are satisfied in relation to any intercepted material if each of the following,
unless such
namely(a) the
extent to which the material is disclosed ;