49 The primary authority relied on by the appellant in support of this contention was again the dissenting judgment of Finkelstein J in Greater Dandenong, an appeal involving a question as to whether the Council's outsourcing arrangement amounted to a contravention of s298L, in which Finkelstein J stated:
[T]he trial judge may not have drawn a sufficient distinction between the immediate reason (motive or purpose) for the dismissals or the acceptance of the tender, and the proximate reason (cause) which explained why that action was undertaken …
50 Finkelstein J then considered the factual findings and disagreed with the inferences Madgwick J at first instance had drawn from those findings such that Madgwick J erred in finding a prohibited reason. In the same case, Wilcox J reached his decision without reference to the distinction enunciated by Finkelstein J and Merkel J in addressing the question of fact as to the determination of the operative reason or reasons distinguished between the cause of the prejudicial conduct and the employer's reason or reasons for engaging in that conduct. Merkel J noted that there can be a significant difference between the employer's subjective reason for engaging in prejudicial conduct and the objective circumstances that led to the employer engaging in the conduct.
51 Mr Dixon SC also referred us to the decision of Branson J in Maritime Union of Australia. With regard to the Greater Dandenong decision, Branson J noted:
54 It is difficult, if not impossible, to identify the ratio decidendi of Greater Dandenong. However, two members of the Full Court (Merkel and Finkelstein JJ) concluded that the learned primary judge had erroneously failed to distinguish between the operative (or immediate) reason for the Council's conduct and the cause (or proximate reason) for the Council's conduct. While, as it seems to me, this distinction may in many cases be easier to articulate than to draw, especially in respect of a statutory provision that recognises the possibility of a number of reasons having a causal connection with conduct, I consider that I should be guided by the approach taken by Merkel and Finkelstein JJ who constituted a majority of the Full Court in Greater Dandenong on this issue. I am fortified in my decision to adopt this approach by the fact that the approach appears to me to be consistent with that adopted by R D Nicholson J in MUA v Geraldton (see [43] above).
55 Adopting the approach identified above, I am satisfied that the Company has proved on the balance of probabilities that the operative or immediate reason (or perhaps reasons) for the conduct of the Company with which this proceeding is concerned was Mr Jones' desire that each of the CSL Pacific and CSL Yarra should have the flexibility to trade as part of the CSL International fleet not only on the Australian coast but elsewhere in a cost effective way. I do not doubt, indeed Mr Jones did not deny, that in the process of reaching his decision that the CSL Yarra should be sold and reflagged, he gave consideration to the cost differential between an Australian crew and a foreign crew. As mentioned above, that cost differential flows from the content of the industrial instruments. However, it is necessary for me, as R D Nicolson J pointed out in MUA v Geraldton (see [42] above), to characterise the Company's reasons, which in this case are in reality Mr Jones' reasons. This exercise of characterisation involves, as his Honour observed, questions of judgment. In my judgment, part of the reason (or perhaps one of the reasons) for Mr Jones' decision was the desirability, as he saw it, of the CSL Yarra being able to be used in a cost effective way. I am satisfied that he considered that the freedom to crew the CSL Yarra with a crew which did not enjoy the protection of the industrial instruments would contribute significantly to the cost effective utilisation of the vessel. However, it seems to me that the fact that the crew of the CSL Yarra were entitled to the protection of the industrial instruments, while in part a cause of the decision taken by Mr Jones, was not an operative reason for his decision in the sense identified in [54] above. The relevant operative reason, I find, was the need to be able to utilise the vessel in a cost effective way.
52 The appellant also referred us to the decision of Goldberg J in Australian Workers' Union and Another v John Holland Pty Ltd [2001] FCA 93, which also involved a consideration by a Judge of the Federal Court of s298V of the Workplace Relations Act 1996, as supporting the use of a distinction drawn by Finkelstein J. We do not consider the judgment of Goldberg J applies the distinction drawn by Finkelstein J as, on the facts, Goldberg J was able to conclude that the respondent proved that it did not dismiss the employee because of the alleged prohibited reason (in that case because he was a member of the AWU). Accordingly, the circumstances of that case may be distinguished from the present matter as the respondent was able to prove that it did not terminate the employee's employment for a prohibited reason.
53 Mr Dixon SC also referred us to the decision of North J in AMIEU v Belandra (to which reference has been earlier made), which related to a question whether a union member had been victimised by a refusal of employment. In the course of his decision, North J analysed the judgments in Greater Dandenong and the decision of Branson J in MUA v CSL and concluded: