function of the Intelligence Service or
GCHQ; and
(b)
that there are satisfactory arrangements
in force to secure -
(i)
that nothing will be done in reliance on
the authorisation beyond what is
necessary for the proper discharge of a
function of the Intelligence Service or
GCHQ; and
(ii)
that, in so far as any acts may be done in
reliance on the authorisation, their
nature and likely consequences will be
reasonable, having regard to the
purposes for which they are carried out;
and
(c)
that there are satisfactory arrangements
in force under section 2(2)(a) or 4(2)(a)
above with respect to the disclosure of
information obtained by virtue of this
section and that any information obtained
by virtue of anything done in reliance on
the authorisation will be subject to those
arrangements.
(4) Without prejudice to the generality of the
power of the Secretary of State to give an
authorisation under this section, such an
authorisation (a)
may relate to a particular act or acts, to
acts of a description specified in the
authorisation or to acts undertaken in the
course of an operation so specified;
(b)
may be limited to a particular person or
persons of a description so specified; and
(c)
may be subject to conditions so specified.
(5) An authorisation shall not be given under this
section except (a)
under the hand of the Secretary of State;
or
(b)
in an urgent case where the Secretary of
State has expressly authorised it to be