Causation - principles
58 Causation is squarely in issue between the parties.
59 Both s 5(1) and 5(2) refer to treatment that is less favourable 'because of the disability'. On its face, an applicant must establish a causal connection between their disabilities and the alleged unlawful discrimination.
60 The meaning or effect of 'because of' in the context of s 5(1) was summarised recently in State of New South Wales - Sydney Trains v Annovazzi [2024] FCAFC 120 (Bromwich, Raper and Shariff JJ) as follows:
[104] It will be apparent from the interaction of these statutory provisions that it will be necessary to identify the acts and conduct of the alleged discriminator, as well as the reasons for those acts and conduct. In Purvis v State of New South Wales [2003] HCA 62; 217 CLR 92, Gleeson CJ considered that the applicable provisions of the DDA are concerned with the 'true basis' of the conduct in question: at [13]. The plurality stated at [236] that, relevantly, '…the central question will always be - why was the aggrieved person treated as he or she was? If the aggrieved person was treated less favourably was it "because of", "by reason of", that person's disability?' (emphasis in original). Although this articulation of the 'central question' was strictly obiter, it has been cited with approval and applied in other decisions including by previous Full Courts: see Sklavos v Australasian College of Dermatologists [2017] FCAFC 128; 256 FCR 247 at [27] and [41] (Bromberg J, Griffiths and Bromwich JJ agreeing on this point); and Forbes v Australian Federal Police (Commonwealth of Australia) [2004] FCAFC 95 at [58] and [84] (Black CJ, Tamberlin and Sackville JJ).
[105] When determining the 'why', the plurality in Purvis stated at [225] that s 5(1) presents two questions:
(i) How, in those circumstances, would the purported discriminator have treated a person, without [the person's] disability?
(ii) If [the person's] treatment was less favourable than the treatment that would be given to a person without the disability, was that because of [the person's] disability?
(Emphasis in original).
61 The key authorities referred to in Sydney Trains, being Purvis and Sklavos v Australasian College of Dermatologists [2017] FCAFC 128; (2017) 256 FCR 247, have been cited on numerous occasions. The High Court in Purvis addressed the causation question in s 5(1) of the DDA, prior to the introduction of s 5(2) in 2009 (by the Disability Discrimination and other Human Rights Legislation Amendment Act 2009 (Cth)). Section 5(2) was considered by Mortimer J in Watts. Importantly, it was considered by a Full Court in Sklavos.
62 In Sklavos, Bromberg J (with whom Griffith and Bromwich JJ relevantly agreed) rejected a submission that s 5(2) required a different approach to causation to that required by s 5(1) that focussed on whether the effect of a failure to make reasonable adjustments was discriminatory. As the nature of the causation element required by s 5(2) is live in this application, it is appropriate to set out a number of paragraphs from the reasons.
63 Relevantly, Bromberg J stated:
[30] Dr Sklavos contended that s 5(2) requires a different approach to causation and comparison than that required by s 5(1). That much I would not dispute. By introducing concern for the making of a reasonable adjustment as well as for the less favourable treatment, the question of causation under s 5(2) is not as straightforward as for s 5(1). This is because on the face of the terms of the provision, an issue is raised as to whether the causation question is directed to the reason for the discriminator's failure to make the reasonable adjustment or to the reason for the less favourable treatment which results or to both of those matters. Dr Sklavos submitted that the primary judge's concern for the College's reasons for failing to make the reasonable adjustments were 'irrelevant' and 'distracting'. I do not agree. I see no reason why the causation question should not be asked in relation to all of the conduct of the alleged discriminator because the failure to make the adjustment will inevitably feed into the conduct of the discriminator constituting the treatment. The result is that where the disability is a reason for any of that conduct the causation element of s 5(2) will be established. The primary judge's concern with the reason for the College's refusal to make adjustments for Dr Sklavos was relevant and part of her Honour's conclusion that nothing that the College did was because of Dr Sklavos' disability.
[31] However, Dr Sklavos' contention went further. It was submitted that 'the whole focus of paragraph (b) [of s 5(2)] is not on the treatment but the effect'. That is to say that whereas s 5(1) is concerned with the reason for less favourable treatment, s 5(2) is concerned with whether the effect of a failure to make a reasonable adjustment results in less favourable treatment. It was contended that the whole focus of s 5(2) was on 'the effect', that is, the effect of a failure to make the reasonable adjustment and that the reason for the conduct of the discriminator is not part of the relevant inquiry.
[32] Dr Sklavos' construction of s 5(2) is wrong on a number of levels. That s 5(2) poses a causation question is obvious. The phrase 'because of the disability' appears. It must be dealing with causation and it must be given work to do.
[33] Consistently with s 5(1), s 5(2) poses two questions - the comparator question and the causation question. Whilst the context is different, the comparator question - was the aggrieved person treated less favourably than a person without the disability would be treated in circumstances that are not materially different - is in the same terms. Just as for s 5(1) that inquiry identifies whether there is less favourable treatment. To my mind the next inquiry is the same as that identified by Gummow, Hayne and Heydon JJ in Purvis at [213] for s 5(1):
If that comparison reveals that the disabled person was treated less favourably, the further question which must be asked is whether that was because of the disabled person's disability.
64 His Honour then considered the explanatory memoranda relevant to the introduction of s 5(2), rejecting Dr Sklavos' submission that it was introduced in order to remove or alter the causation inquiry defined in relation to s 5(1) but where s 5(2) was applied (at [36]). Bromberg J examined the approach of Mortimer J in Watts and rejected Dr Sklavos' submission that her Honour, by referring to the requirement for s 5(2)(b) as 'an inquiry into the effect of there being no reasonable adjustments for the aggrieved person', was intending to suggest that there was no requirement under s 5(2) to answer the same caution question - that is, whether the disability was a reason for the conduct of the discriminator (at [38]). His Honour continued:
[40] … I do not consider that the causation question need not be asked. In comparable circumstances, Gummow, Hayne and Heydon JJ in Purvis at [231] and [232] said that both the comparative and causation questions needed to be asked and not be elided. In any event, I do not consider that Mortimer J was intending to suggest that the causation inquiry is different in s 5(2) than it is in s 5(1) in the sense for which Dr Sklavos contends: that a reason for the conduct need not be the disability. The application of the construction given to s 5(2) by Mortimer J to the facts of that case reveals that through the comparison inquiry the question of whether the applicant's disability explained the conduct (the unfavourable treatment) was both posed and answered (see at [249]-[254]).
[41] There is no doubt that the effect of the discriminator's conduct may bear upon why the aggrieved person was treated as he or she was. In addressing the causation inquiry in s 5(1) what was said (in full) at [236] by the majority in Purvis was this (emphasis in original other than underlining):
For present purposes, it is enough to say that we doubt that distinctions between motive, purpose or effect will greatly assist the resolution of any problem about whether treatment occurred or was proposed 'because of' disability. Rather, the central question will always be - why was the aggrieved person treated as he or she was? If the aggrieved person was treated less favourably was it 'because of', 'by reason of', that person's disability? Motive, purpose, effect may all bear on that question. But it would be a mistake to treat those words as substitutes for the statutory expression 'because of'.
[42] As those observations suggest, why an aggrieved person is treated in a particular way as a consequence of not being provided with an adjustment may be the result of the effect (perhaps the cost) upon the discriminator of the provision of the adjustment. But the existence of an effect does not change the nature of the causation inquiry.
[43] I recognise that there is some ambiguity introduced into s 5(2) by the use of the word 'effect'. However, read in its context, the word 'effect' is there used to provide some nexus between the failure to provide the adjustment and the less favourable treatment, and does not diminish the requirement that the disability be a reason for the less favourable treatment. Unlike s 6, where the word effect is addressing the disadvantageous conduct itself ('effect of disadvantaging'), in s 5(2) the word 'effect' is addressing an anterior stage namely an omission that brought about the disadvantageous conduct. Understood in that way, just like in s 5(1), the nexus to disability is from conduct (the unfavourable treatment) and not from the effect of conduct as in s 6.
[44] That construction is in harmony with the structure adopted by the DDA for separating direct disability discrimination from indirect disability discrimination, as well as providing internal harmony for s 5 itself. To construe the causation question as addressing the effect of the discriminator's conduct rather than the reason for that conduct would severely undermine that intended harmony.
65 Sklavos has been cited subsequently in the context of s 5(2) of the DDA in a number of first instance decisions of this Court.
66 In Varasdi, O'Callaghan J struck out a claim which pleaded s 5(2) direct discrimination in relevantly the following manner:
70. The failure to provide Mimi with the [reasonable adjustments] herein a safe environment and protection from bullying/teasing/assault had the effect that Mimi was, because of the [disabilities], treated less favourably than students:
(a) without disabilities or without Mimi's disabilities;
(b) who were being subjected to bullying, teasing and assault;
[etc]
would be treated, being circumstances not materially different.
…
72. The reasonable adjustments were not provided because of Mimi's disabilities.
67 His Honour referred to Sklavos, including [30] of the Sklavos reasons which is extracted above, and observed that there must be a causal nexus between the alleged failures to provide reasonable adjustments and the aggrieved person's disability. His Honour continued:
[34] It is not sufficient to assert that something is a reasonable adjustment and allege, without more, that it was not provided. The paragraphs comprising the Eleventh Allegation do no more than that. They cannot therefore be allowed on that ground alone.
…
[36] Paragraph [67] also pleads that the applicant was not provided with the reasonable adjustments set out in paragraph [66.4]. However, even if the applicant could, contrary to the respondent's case, make good the allegation that it provided none of the measures identified, and that they are capable of being characterised as reasonable adjustments under the DDA, the proposed amended pleading does not otherwise plead that the applicant's disability was a reason for the alleged failure to provide these measures.
[37] Paragraph [72] says that '[t]he reasonable adjustments were not provided due to and/or because of [the applicant's] disabilities'. However, no particulars or material facts are relied on. The mere assertion of causation cannot establish causation. Paragraph [71], which posits the situation of a student without disability, likewise does not provide the missing links.
68 In Connor v State of Queensland (Department of Education and Training) (No 3) [2020] FCA 455, Rangiah J said:
[264] The statement of claim refers to the 'supports' alleged to have not been provided. Assuming that the 'supports' are intended to refer to 'reasonable adjustments' that should have been made, there is no pleading that their non-provision had the effect that Beau was treated less favourably because of his disability. However, since Beau is no longer legally represented, I will treat the statement of claim as making such an allegation.
[265] For the purposes of s 5(2) of the DDA, it is necessary to consider:
(1) Whether the aggrieved person has, because of his or her disability, been treated less favourably than a person without that disability would be treated in circumstances that are the same or not materially different.
(2) Whether the alleged discriminator did not make the reasonable adjustments for the aggrieved person that are alleged not to have been made.
(3) Whether there is a causal nexus between the alleged failure to provide reasonable adjustments and the aggrieved person's disability.
(4) Whether the failure to make the reasonable adjustments has had the effect that the aggrieved person was treated less favourably because of his or her disability.
(5) Where pleaded by the alleged discriminator, whether the adjustments alleged not to have been made were 'reasonable adjustments'.
69 More recently, Abraham J in Gordon at [20] said, in the context of causation, that 'the disability must be a basis or reason for the conduct of the discriminator', citing Sklavos at [23].
70 It is apparent from both Varasdi and Connor that whilst it was appropriate to plead the effect of the failure to provide reasonable adjustments, the Court also stipulated, by reference to Sklavos, that a causal nexus between the alleged failure to provide reasonable adjustments and the aggrieved person's disability was an element of the claim.