(1) The chief officer of an agency must, on the revocation or proposed revocation of a warrant issued to the agency, immediately take such steps as are necessary to ensure that interceptions of communications under the warrant are discontinued.
(2) If the chief officer of an agency or the Director - General
of Security is informed under section 57 of the revocation or proposed
revocation of a warrant, he or she must immediately take such steps as are
necessary to ensure that interceptions of communications under the warrant by
the agency or the Organisation (as the case requires) are discontinued.