7 The usual practice of this Court in awarding interest under that section has been explained as follows by Finn J in GEC Marconi Systems Pty Ltd v BHP Information Technology Pty Ltd (2003) 201 ALR 55, at 58 [7];
'No rate of interest is fixed or prescribed by the section and the Court has not, by Practice Direction or otherwise, sought to provide guidance on what might be considered an appropriate rate to be applied. Though the matter is, and remains, one of judicial discretion, the usual practice that has been followed in applying s 51A has been to adopt the rates of interest applied by the Supreme Court of the State or Territory in which this Court is dealing with the matter (Namol Pty Ltd v A W Baulderstone Pty Ltd (No 2)(1993) 47 FCR 388; 119 ALR 187; Kettle Chip Company Pty Ltd v Apand Pty Ltd (No 2)(1998) 83 FCR 466; 155 ALR 134; H K Frost Holdings Pty Ltd (in liq) v Darvall McCutcheon (a firm)[1999] FCA 795; BC9903352 (H K Frost Holdings Pty Ltd); McCormick v Riverwood International (Australia) Pty Ltd [2000] FCA 32; BC200000071) unless there is evidence that those rates are penal or not commercial (EMCL Pty Ltd v ESANDA Finance Corp Ltd [1999] FCA 978 BC9904104). The practice itself is one from which there has been occasional departure: see eg White Industries (Qld) Pty Ltd v Flower & Hart(No 2) (2000) 103 FCR 559; 177 ALR 567.'
8 There was no evidence in the present case that the rates of interest prescribed from time to time pursuant to the Penalty Interest Rates Act 1983 (Vic) were penal or not commercial. I propose, accordingly, to apply those rates in calculating interest on the amount of $58,331 awarded to Arms.
9 It was contended by Mr Cawthorn on behalf of WSA that interest should be awarded only from 26 July 2004, that being the date on which the cause of action based on the misleading or deceptive ANZ Requirements Representation was first introduced into Arms' second amended statement of claim. The lateness of the invocation of that cause of action was said, as I understood the argument, to amount to "good cause to the contrary" within the meaning of the prefatory words of s 51A. Reference was made in support of that contention to Clarke v Foodland Stores Pty Ltd [1993] VR 382. In that case, interest was allowed by the trial judge on certain amounts recovered as preferences by the liquidator of a company. The liquidator, through his solicitors, had first made a demand to recover the preferences on 24 December 1986, but the trial judge on 6 June 1991 awarded that the "average interest rate from time to time of s 2 of the Penalty Interest Rates Act 1983 for the period from 24 December 1986 to 14 May 1991" be applied to the sum recovered "over a period of two and a half years", ie from December 1988. The Full Court declined to interfere with that exercise of his Honour's discretion because it considered that it had been open to the learned trial judge to conclude that delay on the part of the liquidator in pursuing his remedies constituted "good cause" within the meaning of s 58(1) of the Supreme Court Act 1958 (Vic) which corresponds, in material respects, with s 51A(1) of the Federal Court of Australia Act.
10 A significant difference between the statutory regime considered in Clarke v Foodland Stores Pty Ltd VR 382 and that applicable to the present case is that s 58(1) of the Victorian Act allowed the awarding of interest from the time "when the debt or sum was payable … or from the time when the demand for payment was made" rather than from "the date when the cause of action arose" which is the expression used in s 51A(1) of the Federal Court of Australia Act. The Full Court in Clarke v Foodland Stores Pty Ltd VR 382 held that the statutory prescription that interest should be allowed "at a rate not exceeding that fixed" under s 2 of the Penalty Interest Rates Act accorded a general discretion to the trial judge irrespective of whether "good cause" had been shown to the contrary. Their Honours also observed, at 392, that, if a trial judge were to hold that "good cause to the contrary" had been shown, he or she would have a largely unfettered discretion to allow interest otherwise than in accordance with the express requirements of s 58(1) of the Victorian Act. The same Full Court went on to acknowledge that what amounts to "good cause" in any given case depends on the particular facts and circumstances of that case and is also in the discretion of the trial judge. They then proceeded to hold, at 398, that "it cannot be said that delay is never irrelevant; every case must turn on its own particular facts and circumstances" (original emphasis). In the case before them, their Honours observed, it could not be said that the liquidator's delay was necessarily irrelevant to the trial judge's discretion. In the present case, there was an appreciable delay by Arms, attributable solely to his own legal advisers, in instituting his action and, later, in making the appropriate amendment to invoke the cause of action on which he ultimately succeeded. In the light of the observations in Clarke v Foodland Stores Pty Ltd VR 382, I consider that, in the circumstances of the present case, and notwithstanding the delay which I have identified, it is open to me to allow interest from the date when the relevant cause of action arose. I propose to do so.
11 The amount of damages awarded on 8 July 2005 represented loss of profits resulting from approximately seven months delay incurred in the development of Arms' business between November 2000 and 30 June 2001. It is, therefore, appropriate to allow interest from the date when that loss crystallised and the relevant cause of action arose for contravention of the Trade Practices Act 1974 (Cth) constituted by the falsity of the ANZ Requirements Representation; ie, 30 June 2001. Adopting, in accordance with the authorities noted at [7] above the rates prescribed from time to time pursuant to the Penalty Interest Rates Act 1983, interest on the sum of $58,331 should therefore be calculated as set out in the following table;
'Start Date End date Days Rate Total
30 June 2001 3 May 2002 308 11.5% $5,660.50
4 May 2002 24 August 2002 113 12.25% $2,212.18
25 August 2002 17 December 2002 115 12% $2,205.39
18 December 2002 23 March 2003 96 11.5% $1,764.31
24 March 2003 25 June 2003 94 11% $1,652.45
26 June 2003 30 June 2004 371 11.25% $6,661.17
1 July 2004 31 March 2005 274 12% $5,244.94
1 April 2005 8 July 2005 99 11.5% $1,819.45
Total 1470 $27,220.40'