20   Investigations generally

(1)  The Commission may conduct an investigation on its own initiative, on a complaint made to it, on a report made to it or on a reference made to it.

(2)  The Commission may conduct an investigation even though no particular public official or other person has been implicated.

(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.

(4)  (Repealed)

(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.