Through the committee and the establishment of the committee itself of IPSA, there are some mandatory positions, I believe. You said, for example, there's the High Court judge; I think you mentioned the auditor. Then it is left, is it, for the other three spots to be appointed by a hiring committee of the Speaker, which the Speaker would chair?
Evidence of meeting #6 for Procedure and House Affairs in the 41st Parliament, 2nd Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was audit.
A recording is available from Parliament.