72 In Roads & Traffic Authority of NSW v Conolly , Adams J referred to a decision of Balmford J in Fitzgerald v Magistrate's Court of Victoria [2001] VSC 348; [2001] 34 MVR 448, in which her Honour, at [20], stated, " I note that in the second edition of the Oxford English Dictionary 'on the cards' is defined as meaning 'within the range of probability' ". Adams J said at [12]:
"Accepting this to be so, it seems to me that the relevant "range" is therefore between the barely probable and highly probable. With respect, it seems to me that this area of the law is bedevilled with metaphors. I think the essential notion is that there is a reasonable chance that the material sought will assist the defence. If it is reasonable to infer that the material sought exists and that it is relevant to an issue, though its content is unknown, it will almost invariably be logically the case (as it seems to me) that such a chance exists, even though it might be thought to be unlikely. Seeking that material therefore seems to me to be a legitimate forensic purpose, providing of course that the factual issues and the character of the material sought are precisely identified." (Emphasis added)
9 In Lakatoi v Walker [1999] NSWSC 1036, I outlined an earlier interlocutory judgment of Rolfe J in the same proceedings ([1998] NSWSC 470) which dealt with a number of subpoenas which had been issued and dealt with a number of notices of motion seeking to set aside those subpoenas. The judgment included a reasonably detailed examination of the authorities and of the principles involved. Rolfe J enunciated, in a fashion which I would not depart from, the basic parameters which are to inform the Court in the exercise of its discretion where an application to set aside a subpoena is pursued.
10 On the one hand, there is clearly to be recognised, the obvious danger of permitting a party by use of the subpoena procedure, to investigate issues of credit having no conceivable relevance to issues pleaded, in the sense that to permit subpoenas of that type to be called would open up matters falling outside the legitimate field of enquiry raised by the issues in contest. On the other hand, it seems to me quite clear that inspection should be granted, so far as is necessary, in the proper conduct of the litigation, where the Court forms the view that the material falls within the legitimate field of enquiry raised by the issues in contest and is reasonably likely to add in the end in some way or other to the relevant evidence in the case. The exercise, recognised by Rolfe J, involves the need to balance these alternative considerations.
11 The determination of the Court in the balancing exercise and in particular the proper approach to the question of relevance, requires the Court, as Rolfe J indicated, to bear in mind the entitlement of the parties to build up what his Honour referred to as 'an evidentiary mosaic'.
12 As Rolfe J said, that exercise generally cannot be done, particularly in complicated commercial litigation, by the tender of one piece of evidence or the assertion that only limited material is relevant to the issues involved. As his Honour said, 'particularly is that so when one must have regard to the desirability of as full a cross-examination as possible, assisted by the availability of documents which will aid that'. Hence, as his Honour stated, both as to issues and as to the issue of credit, the Court should not be astute to find irrelevance at an early stage in the proceedings.
13 The breadth of the definition of relevance should also be borne in mind. As Sully J observed in R v Le [2000] NSWCCA 49 at [19]: