There is one observation, arising from the course of argument, which I make about the usual test that it be "on the cards that the documents would materially assist" the defence. The expression is a well accepted one : Alister v The Queen (1984) 154 CLR 404, at 414, R v Saleam (1989) 16 NSWLR 14, at 17-18, RAN v The Queen (1996) 16 WAR 447, at 453 and 456. Perhaps because it is colourful, it is often used. However, it contains an inherent ambiguity which it is desirable to clarify at the outset. "Materially" may mean either "to an important degree; considerably" or, alternatively, "with reference to matter or material things; physically" (Macquarie Dictionary). Similarly, the Oxford English Dictionary distinguishes between the meanings of "connected with matter, not spirit" and "important, essential". Thus, one could understand a need to establish that documents would "materially" assist the defence as meaning that documents would, to an important degree, assist the defence, or simply that documents would, in some relevant respect or in some not fanciful way, assist the defence. I can see no reason why documents should be required to be produced only where their importance, as distinct from relevance, can be demonstrated, and nothing in any of the authorities to which I have been referred appears to require a contrary view. For that reason, it appears to me that the correct understanding of the test to which I have referred is, as Scott J put it in RAN, that there should be evidence that the documents are likely to be "relevant for some legitimate forensic purpose".