Consideration
26 Although it could have been more clearly expressed, the appellant's case at trial included the contention that the Minister's decision involved jurisdictional error because, having chosen to take into account Australia's international non-refoulement obligations in deciding what was in Australia's national interest, she misunderstood those obligations thereby erring in a way going to jurisdiction. The appellant pleaded (and argued) that the Minister's "choice [to consider non-refoulement obligations] required the Minister to correctly understand the content of Australia's international non-refoulement obligations": particular 1(b) of Ground 1 in the amended originating application. This case did not depend on the Minister being obliged to consider Australia's international non-refoulement obligations. The case was not squarely addressed, presumably because the primary judge understood the appellant to accept that Australia's international non-refoulement obligations had to be a mandatory consideration either because of the Minister's "choice" or because it was a mandatory consideration properly implied from the subject matter, scope or purpose of s 501(3) of the Act: J[37].
27 To say that a decision is affected by jurisdictional error is to say that the decision-maker exceeded the limits of the decision-making authority conferred by the statute in making the decision: MZAPC v Minister for Immigration and Border Protection [2021] HCA 17; 273 CLR 506 at [29].
28 The statutory limits of decision-making authority conferred by statute are determined as an exercise in statutory interpretation; non-compliance with express or implied statutory conditions of a conferral of decision-making authority can (but need not) result in a decision that exceeds the limits of the decision-making authority conferred: MZAPC at [30].
29 Ordinarily, it is an implied condition of a statutory conferral of decision-making authority that a decision-maker must proceed by reference to correct legal principles, correctly applied: Hossain v Minister for Immigration and Border Protection [2018] HCA 34; 264 CLR 123 at [29]. The High Court has stated that this implication arises under s 501(3). In Graham at [57], the High Court observed that the satisfaction of the Minister necessary to fulfil the conditions in s 501(3) must be formed on a "correct understanding of the law":
The suspicion of the Minister necessary to fulfil the first condition of s 501(3) and the satisfaction of the Minister necessary to fulfil the second condition of s 501(3) and the relevant condition of s 501C(4) must each be formed by the Minister reasonably and on a correct understanding of the law. The concept of the national interest, the Minister's satisfaction as to which is the subject of the second condition of s 501(3) [the national interest test], although broad and evaluative, is not unbounded. And the statutory discretion enlivened on fulfilment of those statutory conditions must in each case be exercised by the Minister "according to the rules of reason and justice, not according to private opinion; according to law, and not humour, and within those limits within which an honest man, competent to discharge the duties of his office, ought to confine himself".
30 Two matters should be noted about the Minister's reasons in the present case. First, the Minister did not misunderstand Australia's international non-refoulement obligations as enacted. Parliament has determined how Australia's treaty obligations with respect to non-refoulement are to be enacted in domestic law. The domestic law contains Parliament's interpretation of how Australia's international non-refoulement obligations are to operate: Plaintiff M1/2021 v Minister for Home Affairs [2022] HCA 17; 96 ALJR 497 at [9(3)], [16], [32] per Kiefel CJ, Keane, Gordon and Steward JJ.
31 Parliament's interpretation of how Australia's international non-refoulement obligations are to operate is found in s 36(2)(aa) of the Act and associated provisions. If the appellant were to apply for a protection visa, that application would be determined in accordance with that law. As a matter of domestic law, a non-refoulement obligation is not owed under s 36(2)(aa) - the 'complementary protection criterion' - where the risk of harm in question "is one faced by the population of the country generally and is not faced by the non-citizen personally": s 36(2B)(c).
32 The appellant submitted that, as a matter of domestic law, a non-refoulement obligation was owed where the risk of harm falls within the general risk identified in s 36(2B)(c) because that provision only applied to exclude a general risk of harm from s 36(2)(aa) and not from s 36(2)(a).
33 It may be accepted that s 36(2)(aa) supplies the definition of "significant harm" which is a term used in s 36(2)(aa) and not a term used in s 36(2)(a). However, s 36(2)(a) - the 'refugee criterion' - is directed to a "well-founded fear of persecution" of the individual and not to the general security risk faced by the general population, which was the generalised risk upon which the appellant relevantly relied.
34 The second matter to note about the Minister's reasons is that the Minister appreciated that Australia's unenacted non-refoulement obligations might not be fully encompassed by what has been enacted into domestic law. This is what the Minister intended to convey at R[82] by the words: "I am aware that Australia's international non-refoulement obligations may not be fully encompassed by the visa criteria in s 36(2)".
35 On one view, R[79] indicates that the Minister was considering Australia's international non-refoulement obligations as enacted into domestic law. This interpretation is supported by:
(a) a comparison of R[79] (which speaks of "non-refoulement obligations") and R[82] (which speaks of "Australia's international non-refoulement obligations"); and
(b) the fact that the Minister plainly understood that enacted obligations might not fully cover the unenacted obligations.
36 Uninstructed by the respondent's oral submissions, one might have thought that this was the contention raised by [1] of the notice of contention, which provides:
In addition to the reasons given by the primary judge for rejecting Ground 1, the primary judge should also have found, contrary to [60]-[62] of the reasons, that there was no error in the reasoning of the Minister in her assessment of Australia's non-refoulement obligations.
37 This also appears to be the argument put in the respondent's written submissions at RS[7]. However, during oral submissions the Minister:
(a) accepted that R[79] was speaking about Australia's unenacted international non-refoulement obligations; and
(b) did not contest that the unenacted non-refoulement obligations could apply to a generalised risk of harm.
38 If R[79] was referring to non-refoulement obligations as enacted into domestic law, R[79] does not support the existence of any misunderstanding of legal principle and Ground 1 must fail.
39 If R[79] was referring to unenacted non-refoulement obligations and contains a misunderstanding of the kind identified by the primary judge, and accepted by the Minister in oral submissions, then Ground 1 must also fail, for the following reasons.
40 Whilst it is an implied condition of the conferral of decision-making authority in s 501(3) that the decision-maker must proceed on a "correct understanding of the law" (Graham at [57]), Australia's unenacted international non-refoulement obligations are not domestic laws the subject of that implied condition. That is because an international treaty can only operate as a source of rights and obligations under domestic law if, and to the extent that, the treaty has been enacted by Parliament - see: Plaintiff M1 at [20].
41 For the reason just mentioned, Australia's unenacted international non-refoulement obligations also cannot be a mandatory relevant consideration under s 501(3), as the appellant conceded - see: Plaintiff M1 at [29] (addressing s 501CA(4), but with reasoning which is necessarily applicable to s 501(3)).
42 As noted at [26] above, the appellant's case was in essence that - because the Minister chose to consider Australia's international non-refoulement obligations - her choice required her to understand those obligations correctly.
43 The Minister's misunderstanding of Australia's unenacted non-refoulement obligations was not of a kind which establishes an excess of jurisdiction on any of the appellant's arguments:
In considering what was in the national interest and making her decision, the Minister chose to take into account what she understood to be Australia's unenacted international non-refoulement obligations, albeit considering a full assessment could be made later in the context of a protection visa application.
The Minister was mistaken about the content of those unenacted obligations in the way identified by the primary judge.
The Minister's error was not about something which was a mandatory consideration and the error does not otherwise reveal a misunderstanding about the statutory task; rather, it was an error about something the Minister took into account in undertaking the statutory task required of her.
The Minister's error about the content of Australia's unenacted non-refoulement obligations was not shown to be anything other than an error within jurisdiction.
44 The appellant's submission that the Minister did not consider the national interest and did not consider the discretion in s 501(3) must be rejected. The Minister clearly considered both. In considering both of those matters, the Minister made an error within jurisdiction about the content of Australia's unenacted international non-refoulement obligations. This was not an error of (domestic) law. The appellant's submission that any factual or legal error which is material to the decision is a jurisdictional error because it is material must be rejected.
45 Lengthy submissions were advanced by the parties in relation to a number of cases, including: Ibrahim v Minister for Home Affairs [2019] FCAFC 89; 270 FCR 12, particularly at [114]; MQGT v Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs [2020] FCAFC 215; 282 FCR 285, particularly at [21] to [28]; Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs v FAK19 [2021] FCAFC 153; 287 FCR 181, particularly at [83], [86] and [101]-[102]; and Davis v Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs [2021] FCAFC 213; 288 FCR 23. It is unnecessary to address each of them. It is sufficient to note that each turns on the particular statutory scheme being considered, the particular arguments being advanced and the particular facts. Each of them predated Plaintiff M1 in which the High Court pointed out that a number of Federal Court cases had proceeded on incorrect reasoning: at [32].
46 On the other hand, it is desirable to mention the decision of the Full Court in HRZN v Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs [2022] FCAFC 133; (2022) 294 FCR 13 which was decided after Plaintiff M1.
47 The Minister contended the decision in HRZN was fatal to the appellant's argument on this appeal and the appellant contended that it was not, and in oral submissions, that - if it theoretically was - this Court should not follow HRZN because it was plainly wrong.
48 In HRZN, the decision-maker (being a tribunal) had considered Australia's unenacted international non-refoulement obligations when it was not obliged to do so and had then misunderstood those obligations: at [17], [20]. The appellant in HRZN submitted that, once the tribunal chose to consider the non-refoulement claims, it could not misunderstand those claims: at [43]. The appellant submitted that Plaintiff M1 was distinguishable because the decision-maker in that case did not consider non-refoulement obligations at all: at [58]. The Court rejected these submissions saying at [67]:
… It is clear from the plurality reasons in Plaintiff M1 that the consideration by the Tribunal of the non-refoulement claim, based on unenacted international obligations (which was not a mandatory consideration) cannot give rise to jurisdictional error, even though the Tribunal misunderstood the legal content of those obligations. That conclusion follows from the plurality reasons at [20] and [29]: "such obligations are not mandatory relevant considerations attracting judicial review for jurisdictional error" with the necessary consequence that the misunderstanding of the Tribunal in this case, whilst an error of law, was not a jurisdictional error. Rather, it was an error within jurisdiction.
49 The Court stated at [72] that the Tribunal's "misunderstanding of Australia's unenacted international non-refoulement obligations was not a jurisdictional error, but one within jurisdiction". As with all decisions, the reasons in HRZN must be read in context, in particular in light of the case which was advanced. Whilst it might have been expressed in different ways, the import of [67] and [72] is that the Tribunal's error about the content of unenacted non-refoulement obligations, which was not a mandatory relevant consideration, did not establish jurisdictional error on the grounds contended. Rather, the Tribunal's error was within jurisdiction. That conclusion is not plainly wrong.
50 It might be observed that the description in HRZN at [67] of the Tribunal's misunderstanding of an unenacted international obligation as involving an "error of law" is perhaps undesirable because it does not make clear that unenacted non-refoulement obligations are not "law" for domestic purposes or for the purposes of the implied condition of a statutory conferral of decision-making power that the decision-maker act in accordance with law.
51 As noted at [30] and [39] above, the content of unenacted international treaty obligations can only be introduced as law by Parliament enacting those obligations into domestic law, not by the Executive facilitating entry into a treaty. The Tribunal's error in HRZN was about the content of a treaty obligation.
52 An error is not necessarily an error within jurisdiction merely because the error is about something which is not a mandatory relevant consideration. However, to succeed on an application for judicial review, the appellant must establish that the decision-maker exceeded the limits of the decision-making authority conferred by the statute in some way. The appellant did not conduct the case on the basis that the Minister's error established legal unreasonableness or that the decision was irrational or that the Minister's error gave rise to some ground of jurisdictional error other than in the specific way mentioned.
53 It follows that Ground 1 must be dismissed. It also follows that Ground 2 of the Minister's notice of contention - contending that any error was immaterial - need not be decided. Notwithstanding - if it is correct that the Minister made an error about the content of Australia's unenacted non-refoulement obligations and if that had been shown to give rise to a decision made in excess of jurisdiction - the error is likely to have been shown to be material because it is possible that the Minister might have made a different decision.
54 The Minister submitted that the only realistic possibility was that the questions about non-refoulement would have been deferred even if the Minister had not made the conceded mistake. That conclusion might be thought to be likely when one reads the reasons in context. But that is not the test. The Minister chose to take non-refoulement obligations into account at the point in time in which she did, presumably because it informed her decision as to what was in the national interest and how she should exercise her discretion and, on that basis, it is at least possible that she may have reached a different conclusion if she had correctly understood the content of the unenacted obligations.