(3) The Commission may,
in considering whether or not to conduct, continue or discontinue an
investigation (other than in relation to a matter referred by both Houses of
Parliament), have regard to such matters as it thinks fit, including whether
or not (in the Commission's opinion)--
(a) the subject-matter of the
investigation is trivial, or
(b) the conduct concerned occurred at too remote
a time to justify investigation, or
(c) if the investigation was initiated as
a result of a complaint--the complaint was frivolous, vexatious or not in good
faith.
(5) If the Commission decides to discontinue or not to commence an
investigation of a complaint or report made to it, the Commission must inform
the complainant or officer who made the report in writing of its decision and
the reasons for it.