Kioa v West
High Court of Australia · 1985
Kioa v West (1985) 159 CLR 550
An allegation the family had never seen sat in the file the decision-maker read. Was that enough to undo the decision?
Legitimate expectation is no longer a basis for procedural fairness or for its content. WZARH holds that recourse to the notion is both unnecessary and unhelpful, and that it may distract from the real question of what fairness requires in the circumstances. The duty itself, and the hearing-rule content this case describes, are unaffected -- what has gone is the language of expectation as a route to them.
TWO LIMITS ON THE HEARING RULE, STATED BY A UNANIMOUS COURT IN SEPTEMBER 2026. GXT25 v Minister for Immigration and Citizenship [2026] HCA 32, Gageler CJ, Steward and Jagot JJ in a single judgment. FIRST, THERE IS NO DUTY TO DISCLOSE THE DECISION-MAKER'S OWN REASONING AS IT FORMS. At [35], to hold that the delegate had to give the plaintiff an opportunity to comment on the delay in disclosing his claimed sexual orientation "would involve a duty on the delegate to 'expose his or her mental processes' about the information as and when submitted by the plaintiff. There is no such duty known to law." So an adverse inference the decision-maker draws from material the applicant supplied is not itself adverse information requiring a further hearing. SECOND, AND THIS IS THE ONE THAT BEARS DIRECTLY ON THIS PROPOSITION. The hearing rule's requirement to let a person comment on "adverse material from other sources which was put before the decision-maker" is qualified: at [36], "[t]his duty does not arise if inferences supported by that information, while from a source other than the person whose interests stand to be affected by the decision, would obviously be open on the known material." On the facts the other source was country information about the commonness of fraudulently obtained documents in Kenya, and the adverse conclusion drawn from it was one the known material already supported. WHAT A STUDENT MUST NOT DO WITH KIOA: treat "credible, relevant and significant" adverse information from another source as automatically triggering an obligation to invite comment. Ask the further question [36] poses -- whether the inference drawn from it would obviously have been open on what the person already knew was in issue. If it would, no further opportunity is required.
AND WHAT IS UNAFFECTED: the proposition's core. Procedural fairness still attaches to the exercise of statutory power affecting rights or interests directly and individually, subject to a clear contrary statutory intention, and the hearing rule still requires an opportunity to deal with adverse information of that character. What [35] and [36] do is mark where the obligation stops.
What happened?
Mr and Mrs Kioa were Tongan nationals who had remained in Australia after their permits expired. Their daughter was an Australian citizen. The departmental submission the delegate read before deciding to deport them contained an adverse allegation about Mr Kioa's conduct — material the Kioas had never seen and had no chance to answer.
What did the Court decide?
The decision could not stand. The material was before the decision-maker and prejudicial, and the Kioas should have had the chance to deal with it. The judgments take different routes to that conclusion, and the reasoning has proved more important than the outcome.
Proposition
What is the principle?
Procedural fairness is a general obligation attaching to the exercise of statutory power affecting a person's rights or interests, and its core hearing-rule content is an opportunity to deal with adverse information that is credible, relevant and significant to the decision.
Why does this case matter?
It gives a practical first move that is easy to overlook. Obtaining the departmental record can expose an allegation the person was never given a chance to answer — a complaint about the process that stands quite apart from whether the decision was a good one on the merits. What fairness requires beyond that is worked out case by case, from the statute, the nature of the inquiry and the interests at stake.
It is also the reason a decision-maker cannot solve the problem by resolving to ignore something awkward. Brennan J's answer is not that the procedure was irregular — it is that the danger does not go away. Information of that kind "creates a real risk of prejudice, albeit subconscious", and the person affected "will be neither consoled nor assured to be told that the prejudicial information was left out of account" ([38]). Nobody can audit their own mind for an influence they would not notice, so putting the material aside privately leaves standing exactly the risk the hearing rule exists to remove.
Read the separate judgments rather than a headnote. The two halves come from different judges — the general duty from Mason J, the hearing-rule content from Brennan J — and Mason J and Brennan J differ on how the duty arises. Which one a later court follows has mattered a great deal, particularly on legitimate expectations, which the High Court has since abandoned as a way of framing the question.
Exam and application relevance
Identify the power, the person affected, and precisely what the decision-maker had before them. Two threshold questions come before the hearing rule, and both are commonly skipped: does the decision affect this person individually rather than as one of the public — a rate or a general charge does not — and does the statute manifest a contrary intention? Only then ask whether the material was adverse, whether it was credible, relevant and significant, and whether the person had a real chance to deal with it.
Then, for material from another source, ask one more question before concluding that comment was required: would the inference the decision-maker drew from it obviously have been open on what the person already knew was in issue? If it would, no further opportunity arises — see the note on later authority below. And do not argue that the decision-maker had to disclose the reasoning as it formed; there is no duty to expose mental processes. Do not argue from a legitimate expectation: the current question is what fairness required in the circumstances, and the expectation framing will cost you marks as well as being wrong.
Check your understanding
Suppose the delegate had read the allegation and decided to put it out of mind. Would that have cured the problem?