(1) An investigation under this Division by the principal officer of an agency is to be conducted as the person thinks fit.
(2) The principal officer may, for the purposes of the investigation, obtain information from such persons, and make such inquiries, as the principal officer thinks fit.
(3) Despite subsections (1) and (2), in conducting the investigation, the principal officer must comply with any standards in force under section 74.
(4) Despite subsections (1) and (2), the principal officer must act in accordance with any rules relating to fraud that are made for the purposes of the Public Governance, Performance and Accountability Act 2013 , to the extent that:
(a) the investigation relates to one or more instances of fraud; and
(b) those rules are not inconsistent with this Act (apart from subsections (1) and (2)).