Publication of revised AS 4000:2025
In June 2025, Standards Australia published the revised AS 4000:2025 General Conditions of Contract standard form ‘construct only’ construction contract. AS 4000 is one of the most widely used forms of construction contracts in Australia and has been a mainstay for principals, contractors and industry participants for many years. In this Alert, we look at the most significant changes to AS 4000 regarding the introduction of Dispute Avoidance Boards (DABs) in the dispute resolution provisions, how they work, international experience with Dispute Resolution Boards (DRBs), and the potential advantages and pitfalls of the new options.
Key message
Standards Australia is aligning Australian construction contract drafting with best international practice, by introducing more varied and customisable dispute resolution options.
Key change to AS 4000:2025
The revised AS 4000 has introduced a number of drafting and material changes in a welcome effort to modernise the standard form. We previously published a summary of the foreshadowed changes in an article last year, which can be viewed from this link.
Changes to Dispute Resolution
One of the most significant amendments to AS 4000:2025 is the revisions to clause 42 which introduces a more flexible approach to dispute resolution. The default process under the former AS 4000:1997 (conference followed by arbitration) has been replaced by the current default process of negotiation followed by either arbitration or litigation. Relevantly, parties are entitled to choose from a number of alternative dispute resolution forums including mediation, expert determination, arbitration, litigation, and/or the appointment of a DAB. This ‘choose your own’ approach gives parties the ability to apply a dispute resolution regime tailored to the project’s complexity, value and risk profile, as well as having regard to the parties’ commercial relationship.
|
AS 4000:2025 Available Dispute Resolution Processes
|
| Default Procedure |
Negotiation -> Arbitration or Litigation |
| Default (no option selected) |
Negotiation -> Litigation |
| Option 1 |
Negotiation -> Mediation -> Arbitration or Litigation |
| Option 2 |
Negotiation -> Expert Determination -> Arbitration or Litigation |
| Option 3 |
Negotiation -> Mediation -> Expert Determination -> Arbitration or Litigation |
| Option 4 |
Referral to a Dispute Avoidance Board |
What is a Dispute Avoidance Board (DAB)?
A DAB is a panel generally comprised of three independent experts jointly selected by the contracting parties at the start of a project. Their role is both preventive and determinative. They meet regularly during the life of the project, conduct site visits, and maintain a detailed understanding of the works and the parties’ relationship. This enables them to identify emerging issues early and assist the parties in resolving them before they crystallise into disputes. Where disputes do arise, the DAB hears submissions and issues determinations, which can be structured as either ‘interim binding’ or ‘final and binding’. A DAB under the AS 4000:2025 contract is governed by a Dispute Avoidance Board Agreement executed by the parties in the form published by the Dispute Resolution Board Foundation (Region 3).
The ongoing involvement of the DAB throughout the project distinguishes it from other forms of alternative dispute resolution which are typically ad hoc. Unlike mediators or arbitrators who are parachuted in after conflict has escalated, a DAB is said to develop continuity, familiarity and trust. A DAB is intended to encourage the parties to accept its decisions because they know the DAB is familiar with the project and has been chosen by the parties for its technical and legal expertise.
International and Australian experience
Known overseas as DRBs (dispute resolution boards), DRBs have developed a track record over many years suggesting their general utility. In the United States, where they originated in the 1960s, DRBs are now commonplace on major infrastructure projects. The Dispute Resolution Board Foundation reports that 60 per cent of projects utilising DRB’s have no formal referrals to the board and more than 98 per cent of referred disputes resolved without further escalation.
Australia was initially an early adopter of DRBs and the use of DRBs has been reported on several projects since at least the late 1980s. Example projects include the Sydney Desalination Plant Project which was a $1.1 billion project completed on time, under budget and without contractual disputes thanks in part to the presence of a DRB. Similarly, the Adelaide Desalination Plant used a DRB that helped lead to the successful completion of the project on time and under budget. Advocates say these projects illustrate the benefits of embedding a DRB into complex contracts: improved cooperation, reduced adversarial behaviour, and the avoidance of lengthy and expensive disputes.
Advantages of DABs
Advocates say the advantages of adopting a DAB under AS 4000:2025 are clear. The presence of experts enhances trust between parties and fosters a collaborative environment. Confidentiality reduces risks that disputes damage reputations or business relationships. The costs of maintaining a DAB (reportedly less than 0.3 per cent of the project value) is a modest investment in dispute resolution in comparison to the costs of arbitration or litigation. Notably, supporters of DABs claim that the proactive involvement of the DAB significantly improves the likelihood of projects being completed on time and within budget, without the need to resort to ancillary dispute resolution forums such as Courts, Tribunals, or arbitrators.
Industry data underscores these benefits. Globally, only around 1.2 disputes per project are ever referred to a DRB. In Australia, it is estimated that the direct cost of resolving construction disputes amounts to between $560-$840 million per year. Yet in the three decades since DRBs were first introduced, research suggests they have been implemented on more than 2,000 construction projects around the world, collectively valued at over US $100 billion, with 98 per cent of those projects completed without any unresolved disputes. The model works not only by resolving disputes but by preventing them from arising in the first place.
Limitations and industry scepticism
Despite their success, DABs have historically faced resistance in Australia. One reason has been the dominance of alliancing contracts, particularly on major infrastructure projects. Between 2000 and 2012, alliance projects accounted for $65 billion in value, compared to just $7 billion for projects with DABs. Alliancing emphasises collaborative problem-solving without third-party intervention, which has limited the uptake of DABs. However, research now suggests that alliance projects frequently exceed cost estimates, sometimes by as much as 50 per cent, raising questions about their long-term sustainability.
Another limitation has been the reliance on unamended standard form contracts which have not provided for DABs to be implemented in a uniform way. By contrast, international forms such as FIDIC (the International Federation of Consulting Engineers) have included Dispute Avoidance Adjudication Boards as standard since 2017. The new AS 4000:2025 therefore represents an opportunity to alignment with global standards and a chance to normalise DABs in Australian practice.
Another point of contention is the choice of personnel for the DAB. Industry experts with relevant experience and expertise in (say) engineering or project management will undoubtedly assist with resolving many problems in the course of a project. However, where the critical point in issue is legal interpretation, or legal consequence, of contract drafting or contract non-compliance, such personnel may be less well qualified to resolve the problem than a representative with relevant legal expertise.
Finally, costs of the DAB personnel are borne by the contracting parties (typically equally), which suggests that DABs are potentially better suited to higher value contracts, where the costs and consequences of delay can be substantial.
Cost for smaller scale projects
Although data suggests that DABs can be an effective tool to save projects money by avoiding litigation or project delays, dispute boards are still expensive to set up and run. Undoubtedly these expenses can be justified on large scale projects valued at upwards of $30 million where it is far more costly to stage a major arbitration or litigation during or at the conclusion of the project. However, for smaller contracts, the cost of setting up and maintaining a DAB often outweighs the benefits, making it less cost-effective. Further, if contracted parties only refer minor disputes to the DAB, or no disputes arise at all, parties may retrospectively question the wisdom of such expenditure. For projects with a contract value less than $30 million, it is plausible that the use of a single-person DAB could also be justified. While there is no definitive threshold for when the use of a DAB becomes cost-effective, its relative cost would rise as the contract value decreases.
Interim binding or final and binding?
AS 4000 allows the parties to select whether the determinations of the DAB are ‘interim binding’ or ‘final and binding’. Interim binding decisions must be complied with immediately. However, either party may give notice to the other expressing its dissatisfaction with the DAB decision. In these circumstances, the dispute may be escalated to arbitration or litigation. This carries the risk of undermining the board’s effectiveness by leaving room for dissatisfied parties to revisit disputes through alternative dispute resolution forums. Although interim binding decisions allow greater flexibility for parties, a disputed DAB decision may delay the time of resolution and cause the parties to incur additional costs in pursuing arbitration or litigation.
By contrast, final and binding determinations are conclusive. Advocates say this encourages certainty between the parties and fosters a cooperative environment conducive to project success. The benefits of binding decisions include the protection of cash flow, preserving program certainty, and reinforcing the authority of the DAB. It also deters opportunistic challenges, encouraging the parties to accept the determined outcomes and move forward collaboratively. On the other hand, final and binding decisions raise the stakes for each party, which could lead to increased formality, expense and delay akin to arbitration.
A strategic opportunity
The inclusion of DABs in the AS 4000:2025 presents an opportunity for a shift in Australian contracting culture and the construction industry. To date, DABs have been underutilised despite their proven track record of success. Now, with their express recognition in the country’s most widely used standard form contract, there is a clear opening for principals and contractors to embed DABs into their projects. This is not simply a matter of aligning with international best practice; it is a strategic decision that can protect margins, strengthen relationships, and improve delivery outcomes across the Australian construction sector.
Whilst the limitations of DABs identified above will cause legitimate reservations about unconditional adoption of the DAB model, the success of DABs historically both here and overseas should cause industry participants to more carefully weigh the benefits of this option and suggests that some of the concerns may be more theoretical than actual.
We are here to help
As always, there is no “one size fits all” for construction projects. Russell Kennedy has developed a suite of standard form construction contracts for use by principals operating in Victoria and other Australian jurisdictions. Get in touch with Principals, Kyle Gillan and Paul Somers and our construction team to find out how we can help you to tailor your standard form contract requirements to best suit your business objectives.
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