(1) The Commission may from time to time carry out such and so many inspections of relevant grocery goods undertakings as it considers necessary to monitor compliance with regulations under section 63B.

(2) In addition to carrying out inspections under subsection (1), the Commission may, where it has reasonable grounds to believe that a relevant grocery goods undertaking may be failing or may have failed to comply with regulations under section 63B, investigate any complaints it receives in relation to such an alleged failure.

(3) The Commission may decide not to investigate a complaint referred to in subsection (2), or to discontinue an investigation of a complaint, on the grounds that -

(a) the complaint is frivolous or vexatious or was not made in good faith,

(b) the subject-matter of the complaint is trivial,

(c) the conduct complained of occurred at too remote a time to justify investigation, or

(d) there is or was available to the complainant an alternative and satisfactory means of redress in relation to the conduct complained of.

(4) The Commission may make preliminary inquiries for the purpose of deciding whether a complaint should be investigated and may in writing request the complainant to provide further written particulars of the complaint within a period specified by the Commission in the request.