Liability / practitioner assisted a person to avoid GST in his property development business, outside his legal practice / then failed to account for GST / personal misconduct / whether conduct misconduct / Lawyers and Conveyancers Act 2006, section 7(1)(b) / HELD / although IRD declined to pursue action, Tribunal obliged to determine charges laid / offer to complete job as a “cashie” and subsequent accounting miscoding demonstrates intention to assist tax avoidance / disregard of practitioner’s tax and company law obligations / not a fit and proper person to be a lawyer at that time / s 7(1)(b)(ii) test met / misconduct charge proved