An investigator has the following functions—
(a) to investigate, monitor and enforce compliance with—(i) this Act; or(ii) the Building Act 1975 ; or(iii) the Building Industry Fairness (Security of Payment) Act 2017 ; or(iv) the Plumbing and Drainage Act 2018 ;
(b) to investigate or monitor whether an occasion has arisen for the exercise of powers under an Act mentioned in paragraph (a) ;
(c) to facilitate the exercise of powers under an Act mentioned in paragraph (a) .