The Inspector - General may, in his or her discretion:
(a) decide not to conduct an investigation into a complaint; or
(b) if he or she has started such an investigation--decide not to continue investigating the action complained about;
if the Inspector - General is of the opinion that:
(c) the complaint is frivolous or vexatious or was not made in good faith; or
(d) the complainant does not have a sufficient interest in the subject matter of the complaint; or
(e) an investigation, or further investigation, of the action is not warranted having regard to all the circumstances; or
(f) the complainant has not yet raised the complaint with the Commissioner or the Tax Practitioners Board (as applicable); or
(g) the action came to the complainant's knowledge more than 12 months before the complaint was made; or
(h) the complainant has not exercised a right to cause the action to which the complaint relates to be reviewed by a court or by a tribunal constituted by or under a law of the Commonwealth.