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MAC Act Legacy Claims, Dispute Resolution Options for Illawarra and South Coast NSW

Legacy claims under the Motor Accident Compensation Act 1997 in Illawarra and South Coast NSW can be disputed through internal reviews with SIRA, medical dispute pathways with the Personal Injury Commission, and external options like mediation. Claimants must act promptly, gather evidence, and seek legal advice to challenge decisions under the old scheme.

Current as at 24 August 2026

MAC Act Legacy Claims, Dispute Resolution Options in Illawarra and South Coast NSW

Where a person's only injuries resulting from the accident are threshold injuries, weekly benefits and treatment and care generally cease after 52 weeks (ss 3.11 and 3.28).

A threshold injury under the Motor Accident Injuries Act 2017 (NSW) includes a soft tissue injury and a psychological or psychiatric injury that is not a recognised psychiatric illness (adjustment disorder and acute stress disorder are the usual examples; s 1.6 and Motor Accident Guidelines Part 5).

If you're dealing with a legacy claim under the Motor Accident Compensation Act 1997 (MAC Act) in Illawarra or the South Coast, understanding your dispute resolution options is critical. The transition to the current Motor Accident Injuries Act 2017 framework has created specific pathways for resolving disputes over older claims. This article explains how to challenge decisions, what evidence matters, and when to seek help.

How the MAC Act Legacy Claims Work in NSW

The MAC Act, which operated until 2017, provided compensation for injuries from motor vehicle accidents. While the current scheme under the Motor Accident Injuries Act 2017 applies to claims arising after 1 January 2017, legacy claims under the MAC Act are still active in Illawarra and the South Coast. These claims are governed by the old framework, including the 52-week benefit period for threshold injuries and specific rules about what injuries qualify.

Disputes over legacy claims often arise when claimants believe their injuries are more severe than classified, or that benefits were wrongly limited. Key factors include the date of the accident, the type of injury, and whether the claim was submitted under the old scheme. For example, a claimant with a soft-tissue injury that meets the spinal nerve-root criteria under the Motor Accident Guidelines might argue their benefits should extend beyond 52 weeks.

Dispute Resolution Options for MAC Act Claims

1. Internal Review by SIRA

The first step in disputing a decision is to request an internal review with the State Insurance Regulatory Authority (SIRA). This process allows claimants to challenge decisions about benefit calculations, injury classifications, or treatment approvals. SIRA’s guidelines state that reviews must be based on new evidence or a misinterpretation of existing records.

To qualify for an internal review, you must:

  • Provide fresh medical evidence showing a change in your condition
  • Demonstrate that the original assessment missed key details
  • Show that the claimant’s circumstances have changed since the initial decision

2. Medical Dispute Pathway with the Personal Injury Commission

If a claimant disputes a medical assessment, they can use the Personal Injury Commission’s (PIC) medical dispute pathway. This applies when there’s a disagreement about the severity of an injury or the link between the accident and the injury. The PIC will arrange a second medical opinion, often from a specialist in the field.

For example, a claimant with a soft-tissue injury might argue that their condition has worsened beyond the initial assessment. The PIC will evaluate whether the new evidence meets the threshold injury criteria under the Motor Accident Guidelines.

3. External Dispute Resolution Options

If internal reviews fail, claimants may pursue external options like mediation or arbitration. However, these are rare and typically require a strong case. The NSW Civil and Administrative Tribunal (NCAT) can also be involved in disputes over benefit calculations or the interpretation of the MAC Act.

It’s important to note that challenging a decision does not guarantee a change. The PIC and SIRA have discretion to uphold original decisions unless new evidence or a legal error is demonstrated.

Practical Steps for Resolving MAC Act Disputes

To build a strong case, claimants should:

  • Gather all medical records, including reports from specialists and imaging
  • Document any changes in your condition since the initial assessment
  • Preserve accident reports, witness statements, and correspondence with insurers
  • Seek advice from a solicitor experienced in legacy claims

For instance, a claimant who missed the 52-week benefit period might need to provide evidence that their injury was not a ‘threshold injury’ under the old scheme. This could include a medical opinion that the injury meets the spinal nerve-root criteria or shows radiculopathy with specific clinical signs.

Time Limits and When to Act

While the MAC Act did not specify a time limit for disputing decisions, delays can weaken your case. For example, if a claimant waits too long to challenge a benefit calculation, the PIC may argue that the evidence is no longer reliable. It’s best to act within 6-12 months of the original decision, depending on the type of dispute.

When to Seek Legal Advice

Legacy claims are complex, especially when they involve disputes over injury classification or benefit limits. A solicitor with experience in the MAC Act can help you:

  • Navigate the internal review process
  • Prepare a strong case for a medical dispute
  • Understand your options under the current scheme

If you’re unsure whether your claim qualifies for a dispute, contact a legal professional. They can assess whether your case meets the criteria for a review or challenge.

Final Steps for Claimants

If you’re dealing with a MAC Act legacy claim in Illawarra or the South Coast, the first step is to review your records and assess whether a dispute is possible. Use the internal review process with SIRA, and consider the medical dispute pathway if your case involves injury classification. Always act promptly and seek legal advice if you’re unsure about your options.

Every claim depends on its own facts. To request contact about your circumstances, complete the quick, no obligation enquiry form.

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