In this regard see also Australian Iron & Steel Pty Ltd v Banovic (1989) 168 CLR 165 esp per Deane and Gaudron JJ at 175-177 and Waters v Public Transport Corporation (1991) 173 CLR 349 per Mason CJ and Gaudron J (Deane J agreeing) at 359-360.
38 The issue of whether any "less favourable" treatment of the applicant was because of the applicant's opioid dependency involved consideration of the grounds upon which the Club decided to treat the applicant in the way that it did. If any relevant act was done by the Club for two or more reasons and one of the reasons was the disability of the applicant, then for the purposes of the DDA, the act was to be taken to be done for that reason whether or not it was the dominant or substantial reason for doing the act (s 10).
39 The principal contention of the applicant was, in effect, that the Inquiry Commissioner failed to give genuine consideration to whether the applicant was, because of his opioid dependency, relevantly treated less favourably by the Club than, in the same or similar circumstances, it would have treated a person who did not have an opioid dependency. That is, that the Inquiry Commissioner failed to apply the definition of "discrimination" contained in s 5 of the DDA.
40 Aspects of the Inquiry Commissioner's reasons for decision provide support for the above contention. For example, in respect of the meeting of the Judiciary Committee held on 13 August 1996, the Inquiry Commissioner stated:
"I am satisfied that the committee proceedings on 13 August 1996 were conducted without any hint of discriminatory conduct towards the [applicant]. Rather they proceeded cordially with the [applicant] happy to accept the stated outcome."
As to the recommendation that the applicant not drink alcohol while on the Club's premises, the Inquiry Commissioner concluded:
"It was, I am satisfied, seen as a bona fide attempt by the committee to modify or control any excessive behaviour to which the [applicant] might be subject because of his drug use which had been freely and fully revealed to members of the committee."
In regard to the decision to expel the applicant from his membership of the Club, the Inquiry Commissioner concluded:
"This decision was responsibly taken by the Club in the perceived best interest of the membership of the Club and in accordance with the Articles of Association of the Club and having regard to its statutory obligations pursuant to the Registered Clubs Act 1976."
41 The above extracts from the Inquiry Commissioner's reasons for decision suggest that the Inquiry Commissioner overlooked the need, for the purpose of determining whether the applicant had been discriminated against on the ground of his opioid dependency, of determining whether, because of his opioid dependency, he had been treated less favourably than a hypothetical person who was not opioid dependent would have been treated in comparable circumstances. For the purposes of this determination, findings that a meeting proceeded cordially and that the applicant happily accepted a stated outcome were not directly relevant. Similarly, the findings that the committee saw its recommendation that the applicant not drink alcohol while on the Club's premises as a bona fide attempt to modify or control any excessive behaviour to which the applicant might be subject because of his drug use, and that the decision to expel the applicant from membership of the Club was responsibly taken in accordance with the Club's Articles of Association and its statutory obligation under the Registered Clubs Act 1976 (NSW), did not of themselves assist in the reaching of a decision as to whether the applicant was treated less favourably by the Club than in the same or similar circumstances it would have treated a person who did not have an opioid dependency.
42 Moreover, it does not appear that the Inquiry Commissioner sought to identify the grounds upon which the Club decided to treat the applicant in the way that it did. No member of the Judiciary Committee gave evidence before the Inquiry Commissioner. For this reason there was no direct evidence available to the Inquiry Commissioner as to whether a reason for which the applicant was expelled from membership of the Club was that he was opioid dependent.
43 If, as appears to have been the case, the Club decided against calling the members of the Judiciary Committee to give evidence, it was open to the Inquiry Commissioner to call them (s 95(2)). As Murray J pointed out in Perth City v DL (1994) 88 LGERA 45 at 63:
"… it will always logically be the case that to determine the ground of the decision of the corporate entity one must determine what was the ground of the decision of those individual persons who constituted the majority and for that purpose, in my opinion, in a case where there is a majority of one, it would not matter that only one voting individual took his or her decision upon a ground which would be relevant for the purposes of the legislation."
44 In fact, not only did the Inquiry Commissioner not require the members of the Judiciary Committee to be called to give evidence, he declined to receive in evidence minutes of previous meetings of the Judiciary Committee which were tendered on the basis that they tended to establish how the Club had dealt with other members whose alleged conduct was similar to that of the applicant.
45 The following exchange occurred during the inquiry before the Inquiry Commissioner:
"Mr Batley: … I do propose to tender all of the minutes [for 1996], and I would argue that the way in which the club has dealt with other members is a relevant consideration.
The Commissioner: I'd need to be persuaded about that and, as present[ly] advised, I'm not.
…
Mr Batley: … The issue in relation to those proceedings involving other members is to do with the proportion of the penalty to the alleged offence in relation to those other members, as compared to the way in which Mr Marsden was dealt with.
The Commissioner: If I'm going to investigate that then I've got to investigate every incident involving every other member. I certainly don't need to do that and, obviously, I don't think its competent for me to do it anyway."
46 Counsel for the Club conceded before this Court that the failure of the members of the Judiciary Committee to give evidence, together with the rejection by the Inquiry Commissioner of evidence tending to show how the Club had dealt with other members whose alleged conduct was similar to the conduct of the applicant, meant that there was no evidence before the Inquiry Commissioner upon which he could make a determination as to whether the Club, when it expelled Mr Marsden from membership, treated him less favourably than, in circumstances that were the same or not materially different, it would have treated a person who was not opioid dependent. The concession was, in my view, properly made. It was also the case that the Inquiry Commissioner had no direct evidence before him as to the grounds upon which the decision of the Club to expel the applicant from membership of the Club was made. That is, there was no direct evidence as to whether any less favourable treatment was because of the applicant's opioid dependency.
47 The Inquiry Commissioner's reasons for decision disclose that he did not give real consideration to the question of whether the Club, in first recommending that the applicant not drink alcohol on the Club's premises, and then in advising him that he would not be allowed to purchase alcohol for consumption on the Club's premises while he was on medication, because of his opioid dependency, treated him less favourably than, in circumstances that were the same or not materially different, it would have treated a person who was not opioid dependent. The Inquiry Commissioner's satisfaction that the above conduct of the Club was based on the applicant's apparent intoxication on an earlier occasion and on its concern to adhere to a policy which demanded the responsible service of alcohol did not provide an answer to this question.
48 The evidence before the Inquiry Commissioner as to the consumption of alcohol by a person taking methadone was as follows:
"Provided a constant daily dose of methadone is taken, as is the case with methadone programs, methadone does not make a person exhibit signs of intoxication.
Other things [being] equal, a person on methadone, consuming alcohol, would not be at a greater risk of intoxication than a person of similar build etc who consumes the same quantity of alcohol but who was not on methadone. Opiates such as methadone can, in fact, induce liver enzymes and allow greater tolerance of alcohol than other people.
A person suffering from Hepatitis C, taking methadone, who consumes alcohol, does not have a lower threshold for becoming intoxicated than a person who does not have Hepatitis C and who is not taking methadone at the same time."
49 It was, on the evidence before him, open to the Inquiry Commissioner to conclude that the prevailing of the "layman's view" as to the desirability of the applicant's consuming alcohol (see para 26 above) had the result that, because of the applicant's opioid dependency, the Club treated him less favourably with respect to the service of alcohol than, in circumstances that were the same or not materially different, it would have treated a person who was not opioid dependent. That is, that it acted on the basis of an assumption, which it would not have adopted in respect of a person who was not opioid dependent, that he had an unacceptably low threshold for becoming, or appearing to be, intoxicated. The Inquiry Commissioner did not give consideration to this issue.
50 In my view, the complaint of the applicant that the decision of the Inquiry Commissioner involved an error of law, namely an erroneous understanding of what constitutes "discrimination on the ground of disability" within the meaning of the DDA, must be upheld.