Under the work health and safety (WHS) laws your organisation it must ensure, so far as is reasonably practicable, the health and safety of all of its workers, including volunteers. This means that the organisation must provide the same protections to its volunteer workers as it does to its paid workers. The protection covers the physical safety and mental health of all workers, including volunteers.
This primary duty on an organisation is qualified by ‘so far as is reasonably practicable’. This means the organisation does not have to guarantee that no harm will occur, but must do what is reasonably able to be done to ensure health and safety. If your organisation is run by volunteers, this is a factor that will be taken into account in determining what is reasonably practicable for the organisation to do in any given circumstance.