Background
The proceeding arises from the destruction of Unit C4 at the Callide C Power Station near Biloela, Queensland, on 25 May 2021, and later incidents affecting Unit C3. IG Power (Callide) Ltd (IGPC), a 50% joint venture owner of Callide C, sued CS Energy Ltd (CSE), the operator and manager of the plant, and Callide Energy Pty Ltd (CEPL), the other joint venture owner and a wholly owned CSE subsidiary. IGPC alleges misleading or deceptive conduct, breach of the operation and maintenance agreement, and negligence, and its pleading relies heavily on a forensic report by Dr Sean Brady into the causes of the C4 Incident.
Derrington J had managed and determined several related “Callide Matters” on his docket, including proceedings about IGPC’s administration, subpoenas concerning Dr Brady’s report, an insurance dispute, and a civil penalty proceeding brought by the Australian Energy Regulator against Callide Power Trading Pty Ltd (CPT). In that penalty proceeding, his Honour imposed a $9 million penalty on CPT based on a statement of agreed facts that substantially overlapped with Dr Brady’s findings. CSE and CEPL applied for the present proceeding to be reallocated, arguing apprehended bias under the Ebner test.
The Court’s Holding
Derrington J held that the application should succeed on the first basis advanced: his close familiarity with Dr Brady’s report, combined with his earlier acceptance of and reliance upon agreed facts substantially overlapping with that report when imposing a substantial civil penalty, was sufficient to satisfy the Ebner test. His Honour emphasised that the test asks whether a fair-minded lay observer might reasonably apprehend that the judge might not bring an impartial and unprejudiced mind to the issues, and that this threshold was met “albeit only just” in the unusual circumstances of the case. The concern was not actual bias, but the possibility that prior engagement with the report and overlapping agreed facts might consciously or subconsciously influence assessment of causation and responsibility, especially if the report were later held inadmissible.
The Court rejected the respondents’ second basis, which relied on an accumulation of earlier comments and observations in related proceedings. Derrington J held that those statements, viewed individually, cumulatively, or in any combination, did not support a reasonable apprehension of bias. Many were tentative and heavily qualified, expressly noting that responsibility was uncertain, that no final findings were being made, or that CSE might have defences. His Honour also stressed that the fair-minded lay observer is taken to understand context, ordinary judicial practice, and a judge’s capacity to discard irrelevant or prejudicial material.
The Court ordered that the matter be referred to the National Operations Registry for allocation to another judge of the Court, and that there be no order as to the costs of the respondents’ interlocutory application filed 29 July 2026. The disposition was therefore a referral for reallocation, not a finding of actual bias and not a determination of any substantive liability issue.
Key Takeaways
- The Ebner apprehended-bias test can be satisfied by a possibility, not a probability, that a judge might not bring an impartial mind to the issues.
- Prior exposure to inadmissible or extraneous material does not automatically require recusal, but substantial familiarity combined with prior reliance on overlapping agreed facts may do so.
- Tentative, qualified observations in earlier related proceedings will not ordinarily establish apprehended bias when read in context.
- The remedy ordered was referral to the National Operations Registry for allocation to another judge, with no order as to costs of the application.
Why It Matters
The decision is a careful application of apprehended-bias principles in the context of modern docket management, where one judge may repeatedly encounter related proceedings arising from the same event. It shows that efficiency-driven allocation does not displace the need for public confidence in impartial adjudication.
At the same time, the judgment distinguishes between routine judicial exposure to contested material and the narrower circumstances in which prior familiarity, coupled with earlier reliance on substantially overlapping facts in a penalty decision, crosses the Ebner threshold. That distinction will matter in complex commercial and regulatory litigation involving multiple related proceedings.