Quick answer
WHS officers should understand the model Work Health and Safety (WHS) Act and Regulations that most states and territories have adopted, the core duty of a PCBU to ensure health and safety so far as reasonably practicable, the due diligence duty of officers, the requirement to consult workers, and the newer psychosocial-hazard duties. Laws vary slightly by jurisdiction, so always check your state regulator.
The framework
Australia’s WHS system is built on model laws developed by Safe Work Australia and enacted by each state and territory (Victoria runs a similar but separate OHS scheme). They set out duties, not just rules, so the focus is on managing risk reasonably.
Key duties to know
- PCBU duty — a “person conducting a business or undertaking” must ensure health and safety so far as is reasonably practicable
- Officer due diligence — officers must take reasonable steps to ensure the business meets its WHS duties
- Worker duties — take reasonable care for themselves and others, and follow reasonable instructions
- Consultation — consult workers on matters affecting their health and safety
- Incident notification — notify the regulator of certain serious incidents
Psychosocial hazards
Since 2022 the model WHS Regulations include explicit duties to manage psychosocial hazards — risks to psychological health — supported by a Safe Work Australia Code of Practice. States adopted these at different times, so confirm what applies where you operate.
Why it matters day to day
Understanding the duties helps you give practical, defensible advice — and shows due diligence if your work is ever scrutinised.
Learn the law in context
Cert IV WHS (BSB41419) covers applying WHS legislation in the workplace. FMS Training (RTO 45189) delivers it online. See the course →
Frequently asked questions
Are WHS laws the same across Australia?
Most states and territories use the model WHS laws, but there are differences (Victoria has a separate OHS Act). Check your local regulator.
What does “reasonably practicable” mean?
Doing what’s reasonably able to be done to ensure safety, weighing the risk against what’s involved in controlling it.
What is officer due diligence?
The duty on officers to take reasonable steps to ensure the organisation complies with its WHS obligations.
Know your obligations
FMS Training (RTO 45189) delivers Cert IV WHS online and self-paced. Explore the course →
Last updated June 2026 · FMS Training, RTO 45189