HSRs are elected by their peers to be the voice of their DWG, not the employer's representative.
As such we are accountable to members of our DWG. Beyond that HSRs have neither more, nor less duties than any other worker.
Section 58(3) of our OHS Act makes it clear:
Nothing in this Act nor the regulations imposes, or should be interpreted as imposing, a function or duty on an HSR acting in that capacity. (our paraphrasing)
In your capacity as HSR you have no specific duties, nor liabilities. A boss who seeks to impose functions, duties or ‘consequences’ upon a HSR is contravening the Act.
Read more here