(1) In the case of a safety investigation —
(a) where a preliminary inquiry is conducted, the person holding the preliminary inquiry shall advise the Director whether it is appropriate in the circumstances to conduct a safety investigation;
(b) an inspector may provide advice to the Director for the discontinuance of an investigation at any time, and where an investigation is discontinued, the Director shall make his or her reasons for doing so publicly available.
(2) A safety investigation or preliminary inquiry into an accident must be conducted with the objective of preventing future accidents.