(1) In conducting an investigation, an investigator:
(a) must act as quickly, and with as little formality and technicality, as is consistent with a fair and proper consideration of the issues; and
(b) is not bound by the rules of evidence but may inform himself or herself on any matter as the investigator considers appropriate.
(2) Except as provided by this Part, an investigation may be conducted in a manner determined by the investigator.