(1) An inspector may, at any time, conduct an investigation:
(a) to ascertain whether the requirements of, or any requirements properly made under, this Act or the regulations are being complied with; or
(b) concerning a contravention or possible contravention of this Act or the regulations; or
(c) concerning an accident or dangerous occurrence that has happened in the performing of work.
(2) The Inspectorate may direct an inspector to conduct an investigation:
(a) to ascertain whether the requirements of, or any requirements properly made under, this Act or the regulations are being complied with; or
(b) concerning a contravention or possible contravention of this Act or the regulations; or
(c) concerning an accident or dangerous occurrence that has happened in the performing of work;
and the inspector must, unless the Inspectorate revokes the direction, conduct an investigation accordingly.
(3) An involved union may ask an inspector or the Inspectorate to conduct an investigation at a workplace at which an employee, who is a member of the union, performs work for an operator.