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Supply Chain
Product Certification

National Audit Tool (NAT)

In 2005 a multi-jurisdictional working party of regulatory bodies under the Heads of Workers Compensation Authorities was formed to develop an Occupational Health and Safety audit program and a set of audit guidelines that were agreed at a national level - the National OHS Self Insurers Audit Tool (NAT).

National OHS Self Insurer Audit Tool (NAT) Program

This provides a common set of guidelines and a familiar approach to audits undertaken for companies who are self insured for their worker’s compensation.

The intention of the National OHS Self Insurer Audit Tool was to develop a nationally consistent OHS audit tool drawing on the Australian Standard AS/NZS 4801:2001 OHS management Systems specification with guidance for use, as well as other industry-accepted audit tools.
It  assesses the legislative compliance against the Commonwealth Act, and effectiveness, of a licensee’s health and safety management arrangements and its health and safety management systems. It verifies that management systems are in place and evaluates the implementation and effectiveness of those systems. It is not intended to be used for workplace inspections, nor is it designed to assess the performance of individuals.


There are other benefits to certification against NAT, such as consistency of systems across states,  third party independence, assessment of the entire OHS management system, recognition by being licensed to display a well recognised certification trade mark, or integration of audits with other SAI Global assurance services .  

The Audit Process

An audit consists of examining the organisations processes, documentation and records to verify that systems have been developed and implemented and that they are effective. Sometimes observations, and discussions with relevant personnel are an appropriate means for verifying this conformance too.

At the conclusion of the audit, a report is prepared identifying positive aspects of the licensee’s health and safety management systems, and any deficiencies against the audit criteria.


Whilst this program was developed to be undertaken nationally, not all states and territories have yet recognised third party certification. As at July 2009, only WorkSafe in Victoria recognised third party certification against the National OHS Self Insurer Audit Tool Program as an indicator of compliance. This means that in Victoria, self-insured organisations may opt for third party certification of NAT, as they may have done with SafetyMap Advanced Level.  National OHS Self Insurance Audit Tool Program has been designed to replace SafetyMap Advanced.

Organisations with operations outside Victoria may choose to  be certified against the National OHS Self Insurer Audit Tool Program, but may still require a visit or assessment from the  relevant  state regulator.


OHS Case Study 

Find out how ABC Tissues implemented and benefited from an OHS Management System