ICAC Family

The ICAC family refers to the group of Australian state-level independent statutory anti-corruption commissions modelled on, or descended from, the original Independent Commission Against Corruption established in New South Wales in 1988. The New South Wales body, commonly known as NSW ICAC, was created by the Independent Commission Against Corruption Act 1988 in response to sustained public concern about the integrity of state public administration, and its design, an independent body combining coercive investigative powers with public exposure and prevention functions, became the template subsequently adapted by other Australian jurisdictions, including South Australia's Independent Commissioner Against Corruption (ICAC SA). The "ICAC" name and model have since become internationally recognised shorthand for a particular institutional approach to public corruption control, distinct from a purely police-led or purely ombudsman-led model.^[1]

1 Origins of NSW ICAC

NSW ICAC was established following extensive parliamentary debate over corruption in the New South Wales public sector during the 1980s, with the enabling Act passed in 1988 and the Commission itself beginning operations shortly afterward. It was given powers similar to those of a standing royal commission, including the ability to compel testimony and documents, conduct public hearings, and make findings of corrupt conduct against individuals, a significant departure from the investigative powers ordinarily available to police or internal agency investigators. NSW ICAC is organised into divisions covering investigation, corruption prevention, corporate services, and legal functions, and it operates under oversight of a NSW parliamentary committee, an accountability structure later echoed in the oversight arrangements of Australia's federal National Anti-Corruption Commission.^[1][2]

2 The Three-Function Model

The defining feature of the ICAC model, as distinct from many other anti-corruption bodies internationally, is its combination of three distinct functions within a single independent institution: investigation of specific allegations of corrupt conduct, exposure of corruption through public hearings and published findings, and prevention through education, policy advice, and engagement with public sector agencies and the community. This tripartite structure is intended to address corruption at multiple points simultaneously, punishing and deterring individual wrongdoing while also reducing the systemic conditions, weak controls, poor culture, and low community awareness, that allow corruption to recur. See Fraud and Corruption Control Framework for how prevention functions of this kind fit within a broader control architecture, and Organisational Culture Change for the prevention-side objectives ICAC bodies typically pursue.^[1]

3 Replication Across Australian States

Following the establishment of NSW ICAC, several other Australian states and territories created their own independent anti-corruption commissions, generally adapting the NSW model to local constitutional and administrative arrangements while retaining its core investigation-exposure-prevention structure. South Australia's Independent Commissioner Against Corruption, established considerably later than the NSW body, is one prominent example, and the model has also informed integrity bodies in Queensland (see Queensland Crime and Corruption Commission) and other jurisdictions, even where those bodies operate under different statutory names or combine anti-corruption functions with broader organised crime jurisdiction. This pattern, an influential first-mover institution whose design is subsequently adapted state by state, is a recurring feature of Australian public integrity architecture and eventually shaped the design of the Commonwealth's own national body.^[3]

4 NSW ICAC's Factfinder Guide

In April 2022, NSW ICAC published Factfinder: a guide to conducting internal investigations, a practical manual aimed at public sector agencies conducting their own internal investigations into suspected corrupt conduct, whether independently or following referral from the Commission. The guide addresses matters including how to plan an investigation, how to gather and handle evidence, and how to structure an investigation so that its conclusions are defensible if later reviewed. It reflects NSW ICAC's accumulated experience reviewing the quality of internal investigations conducted by agencies across the state public sector, and it is written for investigators without specialist legal training. See Conducting a Corruption Investigation for the practical steps of an investigation that guides of this kind typically describe.^[4]

5 ICAC SA's Internal Investigations Guide

ICAC SA published its own Internal Investigations Guide in September 2022, addressed to public officers responsible for conducting internal investigations within South Australian public authorities. The guide defines key terms used throughout an investigation, including the applicable standard of proof for adverse findings (the balance of probabilities), and draws on the Commission's observations from reviewing numerous internal investigations conducted by South Australian public authorities. It includes practical appendices, including a sample investigation report structure, intended to give investigators a concrete template rather than only abstract principles.^[5]

6 Influence on the National Anti-Corruption Commission

Both the NSW Factfinder guide and the ICAC SA Internal Investigations Guide are cited as source material in the National Anti-Corruption Commission's own July 2026 guide for Commonwealth agencies, Conducting internal investigations into corrupt conduct. This reflects the broader significance of the ICAC family within Australian anti-corruption practice: even though the NACC operates at the federal level and postdates the state ICACs by decades, its investigative methodology draws directly on techniques refined by the state bodies over many years of practical experience. See National Anti-Corruption Commission for the federal body's own powers and investigative model.^[6]

See also: Queensland Crime and Corruption Commission, Conducting a Corruption Investigation, Procedural Fairness.

References

1. Independent Commission Against Corruption (NSW), "About the NSW ICAC" and "History," icac.nsw.gov.au.
2. Independent Commission Against Corruption Act 1988 (NSW).
3. Independent Commission Against Corruption (South Australia), "About ICAC SA," icac.sa.gov.au.
4. Independent Commission Against Corruption (NSW), Factfinder: a guide to conducting internal investigations (April 2022).
5. Independent Commissioner Against Corruption (South Australia), Internal Investigations Guide (September 2022).
6. Commonwealth of Australia, National Anti-Corruption Commission, Conducting internal investigations into corrupt conduct: A guide for Commonwealth agencies (July 2026).