17 The general approach to the apportionment of costs is that it will ordinarily be appropriate to award the costs of proceedings to the successful party without attempting to differentiate between those issues on which it was successful and those on which it failed, unless a particular issue or group of issues is clearly dominant or separable: Hughes v Western Australian Cricket Association Inc [1986] ATPR 48,134 (40-748) per Toohey J. However, subject to this general approach a party may be entitled to the costs of any issue in which he or she succeeds (Laguillo v Haden Engineering Pty Ltd [1978] 1 NSWLR 306), to be set off against the general costs, if that party is otherwise unsuccessful (Jamal v Secretary Department of Health (1988) 14 NSWLR 252), or the court may deprive an otherwise successful party of costs in relation to issues on which it failed.
18 There are, of course, cases in which it has been held appropriate to make interlocutory costs orders, typically in cases where the decision relates to a discrete question or the determination of a separate question, or where there is likely to be a long delay before the final resolution of the proceedings. The general or normal practice, however, is that such costs are not payable until the conclusion of the proceedings: cf Pt 52A, r 9, Supreme Court Rules 1970.
19 There are also decisions, however, which express caution before any order for apportionment is made. In Cretazzo v Lombardi (1975) 13 SASR 4, Jacobs J, in the Full Court of the Supreme Court of South Australia, said (at 16):
… I would wish to sound a note of cautious disapproval of applications, which are being made with increasing frequency, to apportion costs according only to the success or failure of one party or the other on the various issues of fact or law, which arise in the course of a trial.
20 Jacobs J noted that trials occur daily in which the party, who in the end is wholly or partially successful, nevertheless fails along the way on particular issues of fact or law, and concluded by stating (at 16):
There are, of course, many factors affecting the exercise of the discretion as to costs in each case, including in particular, the severability of the issues, and no two cases are alike. I wish merely to lend no encouragement to any suggestion that a party against whom the judgment goes ought nevertheless to anticipate a favourable exercise of the judicial discretion as to costs in respect of issues upon which he may have succeeded, based merely on his success in those particular issues.
21 Similarly, in Trade Practices Commission v Nicholas Enterprises Pty Ltd [No. 3] (1979) 42 FLR 213 at 220, Fisher J saw the discretion to apportion costs as one to be exercise only in the most exceptional circumstances. His Honour accepted, however, that if a considerable portion of the trial is taken up in determining issues upon which the defendant falls, it is a proper exercise of the discretion to reduce the costs allowed to that defendant.