MR JUSTICE BURTON
Approved Judgment
(a) the number of persons to whom any of the material or
data is disclosed or otherwise made available,
(b) the extent to which any of the material or data is
disclosed or otherwise made available,
(c) the extent to which any of the material or data is copied,
and
(d) the number of copies that are made,
is limited to the minimum that is necessary for the authorised
purposes.
(3) The requirements of this subsection are satisfied in relation
to the intercepted material and any related communications
data if each copy made of any of the material or data (if not
destroyed earlier) is destroyed as soon as there are no longer
any grounds for retaining it as necessary for any of the
authorised purposes.
(4) For the purposes of this section something is necessary for
the authorised purposes if, and only if—
(a) it continues to be, or is likely to become, necessary as
mentioned in section 5(3);
...
(5) The arrangements for the time being in force under this
section for securing that the requirements of subsection (2) are
satisfied in relation to the intercepted material or any related
communications data must include such arrangements as the
Secretary of State considers necessary for securing that every
copy of the material or data that is made is stored, for so long
as it is retained, in a secure manner.
(6) Arrangements in relation to interception warrants which
are made for the purposes of subsection (1)—
(a) shall not be required to secure that the requirements of
subsections (2) and (3) are satisfied in so far as they relate
to any of the intercepted material or related communications
data, or any copy of any such material or data, possession of
which has been surrendered to any authorities of a country
or territory outside the United Kingdom; but
(b) shall be required to secure, in the case of every such
warrant, that possession of the intercepted material and data
and of copies of the material or data is surrendered to
authorities of a country or territory outside the United