As usual this issue is not so black and white.
Scotty is right in saying that an owners corporation is exempt from the WH&S Act 2011 if the building is used for residential purposes only BUT what if one or more residents work from home? Surely this exemption is then not applicable.
A WH&S report can be obtain fairly cheaply (less than $400 for a 20 lot scheme) and absolves the committee of any risks associated with doing nothing.
Regardless of legislation and exemptions etc. it is good practice to have a professional report done every few years or when there has been any changes to common Property areas.