Don, if you are on a site jointly controlled by another PCBU there may have been a stipulated frequency of the HS meetings in the contract for work, this can catch companies out, sometimes and be missed.

Have a board advertising the number of days the company (PCBU) and the management (officers) with involvement by the workers to create a safe place of work, great,
or
Is the board advertising the failure of the PCBU to create a safe place of work, the failure of the management to establish positive procedures and the failure of workers to implement functional safe work practices.

Thanks for the comments

@SafetylawyerNZ has provided this link,
https://www.anthonyharper.co.nz/who-can-conduct-workplace-investigations-kathryn-mckinney/.
also Justice Department file reference [2020] NZPSLA 007