AS 2124, AS 4000, and AS 4300 are Australian Standard contracts that are commonly used in construction projects. Each contract has its own unique features and provisions:

AS 2124 

This contract is known as the General Conditions of Contract for Design and Construct. It is typically used for projects where the contractor takes responsibility for both the design and construction aspects. AS 2124 outlines the roles and responsibilities of the parties involved, including the principal, the contractor, and the superintendent. It also covers issues such as site possession, delays, variations, payments, and dispute resolution.
 

AS 4000

This contract is called the General Conditions of Contract. It is often used for traditional construction projects, where the design has already been completed and the contractor is responsible solely for the construction phase. AS 4000 includes provisions related to time, quality, payment, variations, and dispute resolution. It also outlines the rights and obligations of the principal, the contractor, and the superintendent.
 

AS 4300

This contract is known as the General Conditions of Subcontract. It is typically used when subcontractors are involved in construction projects. AS 4300 sets out the terms and conditions between the contractor and the subcontractor, covering areas such as obligations, variations, payments, defects, and dispute resolution.

While these three contracts share some similarities, such as addressing issues related to project timelines, payments, variations, and dispute resolution, they differ in terms of their focus and applicability. AS 2124 and AS 4000 are more commonly used for main contracts, while AS 4300 is specifically designed for subcontractors. It is important for parties involved in construction projects to carefully review and understand the specific provisions of each contract to ensure compliance and smooth project execution.

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​AS 2124, AS 4000, and AS 4300 have different provisions regarding dispute resolution.

In the case of AS 2124, it addresses dispute resolution through a process known as arbitration. If a dispute arises, the contract requires the parties to first attempt to resolve it through negotiation or mediation. If the dispute remains unresolved, it can be referred to an arbitrator who will make a binding decision. The arbitration process is typically conducted in accordance with the rules of a recognized arbitral institution.

AS 4000 also includes provisions for dispute resolution, but it offers more flexibility compared to AS 2124. It allows the parties to choose between arbitration, expert determination, litigation, or another form of alternative dispute resolution (ADR) method. This gives the parties more options to select the most suitable process for their specific situation.

As for AS 4300, it does not specifically address dispute resolution methods. Instead, it refers to the dispute resolution provisions outlined in AS 4000. This means that the subcontractors and contractors involved in projects governed by AS 4300 would need to follow the chosen dispute resolution process stated in AS 4000.

Overall, while AS 2124 primarily focuses on arbitration, AS 4000 provides more flexibility in choosing dispute resolution methods, and AS 4300 relies on the provisions of AS 4000 for resolving disputes.