2025 Changes to Medico-Legal Psychological Reports in WA
From Indefinite Detention to Contractual Mental Harm: The 2025 Revolution in WA Medico-Legal Reporting
The 2024–2025 period has ushered in a wave of legislative and judicial change that is fundamentally reshaping how medico-legal psychological reports are prepared, presented, and scrutinised across Western Australia. For legal practitioners, insurers, and individuals navigating the justice system, understanding these shifts is no longer optional — it is essential.
At Cygnet Medico-Legal Psychologists, we work at the intersection of clinical psychology and the law. In this article, we unpack the key reforms and explain what they mean for anyone commissioning or relying on psychological reports for court proceedings in WA.
1. The Criminal Law (Mental Impairment) Act 2023: A New Era for Forensic Assessment
On 1 September 2024, the Criminal Law (Mental Impairment) Act 2023 (WA) officially commenced, replacing the outdated Criminal Law (Mentally Impaired Accused) Act 1996. This is arguably the most significant reform to the treatment of mentally impaired accused persons in Western Australia in nearly three decades.
The key changes include:
- The end of indefinite detention. The new Act introduces "limiting terms" for custody orders, meaning individuals found unfit to stand trial or not guilty by reason of mental impairment will no longer face the prospect of being detained indefinitely — a practice that had drawn sustained criticism from human rights bodies and legal advocates.
- The Mental Impairment Review Tribunal (MIRT). A new, specialised tribunal has been established to oversee and regularly review custody and supervision orders, replacing the previous fragmented oversight mechanisms.
- Higher evidentiary standards for psychological evidence. With the MIRT now requiring structured, evidence-based assessments to inform limiting terms and review decisions, the quality and rigour of forensic psychological reports has never been more important.
For defence lawyers and prosecutors alike, this means that psychological reports for court — particularly fitness-to-stand-trial and mental impairment assessments — must meet a higher threshold of clinical specificity. Reports that rely on vague clinical impressions without reference to validated psychometric instruments and diagnostic frameworks (such as the DSM-5-TR) risk being challenged or disregarded.
2. Elisha v Vision Australia Ltd: The High Court Opens the Door to Contractual Psychiatric Harm
In December 2024, the High Court of Australia handed down its landmark decision in Elisha v Vision Australia Ltd [2024] HCA 50, overturning over a century of precedent. The Court ruled that employees can claim significant damages — including for psychiatric injury — arising from a breach of an employment contract, such as a flawed or procedurally unfair disciplinary process.
This decision has profound implications for personal injuries psychological reports in Perth and across Australia:
- Expanded scope of psychiatric harm claims. Employees who have suffered diagnosable psychological injury (e.g., Major Depressive Disorder, Adjustment Disorder, PTSD) as a direct consequence of contractual breaches now have a viable pathway to damages — beyond the traditional negligence or workers' compensation frameworks.
- Greater demand for medico-legal assessment. Insurers and employers will increasingly require independent psychological evaluations to quantify the nature, severity, and causation of claimed psychiatric injuries. These assessments must clearly delineate pre-existing conditions from injury-related symptomatology.
- Implications for workers' compensation and employment law. The ruling creates a parallel track of liability that sits alongside statutory workers' compensation schemes, meaning legal practitioners need to consider whether a contractual claim may yield a more favourable outcome for their client.
For psychologists preparing these reports, the Elisha decision reinforces the need for methodologically sound assessments that can withstand cross-examination on questions of causation and foreseeability.
3. Tightened Expert Evidence Standards in WA Courts
Western Australia's courts have simultaneously moved to raise the bar for expert evidence. Two developments stand out:
- Practice Note PNC 5 (District Court of WA, early 2025). The re-issued practice note specifically tightens the requirements for expert evidence, emphasising that medico-legal psychological reports must be objective, evidence-based, and prepared with an awareness that the expert's overriding duty is to the Court — not the instructing party.
- The Harmonised Expert Witness Code of Conduct (Supreme Court of WA, mid-2024). The Supreme Court's adoption of this code now requires parties seeking to introduce psychological evidence to prepare a detailed "Minute" outlining the specific questions, assumptions, and facts upon which the expert is asked to opine.
Together, these reforms signal a clear judicial expectation: psychological reports that are advocacy-driven, poorly structured, or lacking in transparent methodology will face increasing scrutiny and potential exclusion.
What does a compliant report look like? At minimum, it should:
- Clearly state the referral questions and instructions received
- Identify all sources of information relied upon (clinical interview, collateral records, psychometric testing)
- Distinguish between established fact, clinical opinion, and areas of uncertainty
- Be prepared by a psychologist who holds full AHPRA registration and relevant area of practice endorsement (e.g., clinical psychology, forensic psychology)
- Comply with the Psychology Board of Australia's Code of Ethics and the APS Ethical Guidelines for Psychological Practice
4. Criminal Injuries Compensation: The Growing Role of Psychological Evidence
For victims of crime in Western Australia, criminal injuries compensation reports WA remain a critical component of the claims process. The updated eCourts Portal (2024/2025) has streamlined the application process, but the substantive requirements for psychological evidence have, if anything, intensified.
Assessors and decision-makers are increasingly relying on detailed psychological reports to substantiate claims for:
- Nervous shock — a recognised head of damage requiring evidence of a diagnosable psychiatric condition arising from the criminal act
- Loss of enjoyment of life — where a psychologist's assessment of functional impairment, social withdrawal, and diminished quality of life can directly influence the quantum of compensation
- Pain and suffering — supported by validated symptom measures (e.g., the PCL-5 for PTSD, PHQ-9 for depression, DASS-21 for general distress)
A well-prepared criminal injuries compensation report does more than document symptoms. It tells a coherent clinical narrative — linking the index offence to measurable psychological harm, accounting for pre-existing vulnerabilities, and providing a clear prognosis.
What This Means for You
Whether you are a solicitor preparing a brief, an insurer assessing liability, or an individual seeking to understand your rights, the message from these 2024–2025 reforms is consistent: the standard for psychological evidence in Western Australian courts and tribunals is rising.
Reports that are thorough, methodologically transparent, and prepared by appropriately qualified AHPRA-registered psychologists will carry weight. Those that are not will be increasingly vulnerable to challenge.
How Cygnet Can Help
Cygnet Medico-Legal Psychologists is a Perth-based practice of AHPRA-registered psychologists specialising in medico-legal assessment. We prepare medico-legal psychological reports, criminal injuries compensation reports, personal injuries psychological reports, and psychological reports for court — including pre-sentencing reports, fitness-to-stand-trial assessments, and expert witness testimony.
Our reports are prepared in accordance with the Harmonised Expert Witness Code of Conduct, current Practice Notes, and the ethical standards of the Psychology Board of Australia.
We accept referrals from solicitors, insurers, government agencies, and individuals across Western Australia.
Get in touch:
- Fremantle office: ☎ (08) 9467 6373
- Midland office: ☎ (08) 9467 7676
Contact us to discuss your referral or to request our fee schedule and availability.