If a building surveyor is engaged in respect of work in respect of which another building surveyor has already exercised, refused to exercise or is taken to have refused to exercise his or her powers under this Act –

(a) the building surveyor may rely on the certification, reports or decisions of the previous building surveyor; and

(b) unless otherwise directed by the Director of Building Control, the building surveyor is not required to review or inspect work that has been completed before his or her engagement as building surveyor.