The onus is on the plaintiffs to make it appear to the Court that, having made reasonable inquiries, they are unable to obtain sufficient information to decide whether or not to commence proceedings against Nylex. The third requirement of r 5.3(1)(a) requires an objective assessment of the information already possessed by the plaintiffs to determine whether that information is sufficient for such a decision to be made. The question is whether the applicant has insufficient information to be able to decide whether to institute proceedings; not merely to establish a cause of action. Hence, an applicant may be entitled to preliminary discovery of documents relevant to available defences, or the extent of apprehended breaches, or the likely quantum of damages, as well as of documents which may establish whether there is a cause of action. However, unless the applicant is lacking something reasonably necessary to make a decision whether to institute proceedings, he or she is not entitled to preliminary discovery. An applicant must disclose what information he or she already has relevant to making such a decision, and identify what information is lacking. Preliminary discovery cannot be used to build up a case which an applicant has already decided, or could decide, to bring (Alphapharm Pty Ltd v Eli Lilly Australia Pty Ltd (Lindgren J, Federal Court of Australia, 24 May 1996; St George Bank Ltd v Rabo Australia LtdGlencore International AG v Selwyn Mines Ltd (recs and mgrs apptd) [2005] FCA 801; (2005) 223 ALR 238 at 241 [15]; Matrix Film Investment One Pty Ltd v Alameda Films LLC [2006] FCA 591 at [15]-[19], [25]).