16.—(1) The purpose of the investigation is to—
(a)gather evidence to establish the facts and circumstances of the alleged misconduct or gross misconduct, and
(b)assist the appropriate authority to establish whether there is a case to answer in respect of misconduct or gross misconduct or whether there is no case to answer.
(2) The investigator must as soon as practicable after being appointed draw up the terms of reference of the investigation.