19 Having established that each element of the expression has its own independent meaning, it is axiomatic when the expression is applied to a particular case and set of circumstances, that not all the three descriptors might be evident. A particular dismissal might be found to be 'harsh', but not 'unreasonable' or 'unjust'. Other variations might be found.
20 This principle arises from the oft quoted authority in Byrne & Anor v Australian Airlines, 185 CLR 410, where the expression 'harsh, unjust or unreasonable' was considered in the context of an award provision. In their joint judgment, McHugh and Gummow JJ said at p465:
It may be that the termination is harsh but not unjust or unreasonable, unjust but not harsh or unreasonable, or unreasonable but not harsh or unjust. In many cases the concepts will overlap. Thus, the one termination of employment may be unjust because the employee was not guilty of the misconduct on which the employer acted, may be unreasonable because it was decided upon inferences which could not reasonably have been drawn from the material before the employer, and may be harsh in its consequences for the personal and economic situation of the employee or because it is disproportionate to the gravity of the misconduct in respect of which the employer acted.
21 The principle was further discussed in Outboard World v Muir, 51 IR 167, at 182, where a Full Commission said:
First we deal with the argument for the appellant that the Commission erred by applying the wrong test in connection with the dismissal: 'unfair' rather than 'harsh, unreasonable or unjust' dismissal. We agree with Mr Reitano's submission in this respect that the reference by the Commissioner to "unfairness" did not represent any misunderstanding of the correct test but was merely the use of a shortened form of expression intended to embrace the three relevant words. Whilst we recognise that there may be a natural tendency (recognised in the use even by the advocate for the Company before the Commissioner of the term 'unfair') to use the shortened form, we consider that it is preferable that a member of the Commission utilise the precise words provided by s246, rather than the catch-all heading, particularly when expressing the basis for a finding that a dismissal is within one or more of the heads provided by the section. We take this view because, even though there may be some circularity in the full phrase 'harsh, unreasonable or unjust', we detect scope for variation of meaning which may be critical to the determination of a particular matter and may be obscured by the use of the substitute term "unfair". Different but not wholly dissimilar words, "unfair", "harsh", and "unconscionable", are used in s275, power of the Industrial Court to Declare Certain Contracts Void, of the 1991 Act. In relation to those words, then appearing in s88F of the 1940 Act, the Commission in Court Session (Perrignon, Cahill and Dey JJ) in A & M Thompson Pty Ltd v Total Australia Ltd [1980] AR (NSW) 399 at 418 (Cahill J delivering a separate judgment) said:
The duty of the Commission is to reach a conclusion on the issues of whether the subject transaction is 'unfair', or 'harsh' or 'unconscionable'.
It has been said that those words are a 'tautological trinity' ( Davis v General Transport Development Pty Ltd ) [1967] AR 371) but we prefer to take the view that there is a perceptible difference between the meaning of the term 'unfair' and that of the terms 'harsh' and 'unconscionable'. What is unfair may not be so unfair as to be 'harsh'. But, whether this view be correct or not, once the transaction is found to be unfair the Commission may proceed to exercise its very wide power.