You’ve got me!!
All I can think of is that if you’re in NSW where recent changes to work health and safety legislation affects Strata Schemes where business activities of some types are undertaken, usually in street level commercial lots, somebody may have suggested to your Owners Corporation (O/C) that holiday letting is a business, thereby making your Scheme liable to the provisions of that Legislation due to the activities of you and the other Owner who manage your lots in that way.
Actually, it’s more accurate to say that the NSW Work Health & Safety Act (the Act) applies to Strata Schemes that are not entirely residential, and in my opinion if your Scheme is entirely residential then its exempt from the provisions of the Act and from its mandated audit requirements.
That’s not to say that your Executive Committee shouldn’t itself keep an eagle-eye out for potential hazards on its Common Property, or even resolve to pay a Contractor to report on those matters, but that’s at your O/C’s discretion, and if it goes that way its obligation is to pay for it from the monies contributed to its Administrative Fund by all Owners, not just those who choose to holiday let their lots.