54 The parties agreed, appropriately in our view, that the proper approach to the award of indemnity costs was that expressed by Hill J in Boner v Anderson (No.2) [1993] 50 IR 470 at 475, where his Honour said:
There is little doubt that orders for costs on an indemnity basis still constitute exceptions to the general rule. While costs are, under the Act and the Rules, within the absolute discretion of the Court, nevertheless the Court must exercise its discretion judicially. Many of the criteria upon which such discretion is exercised in cases involving indemnity costs are to be found in the cases to which Mr Shaw referred and in a number of other cases dealing with the matter. It is fair to say that generally speaking an order for costs on an indemnity basis is justified in a case in which there are special or unusual features of an unmeritorious or improper nature surrounding the case of one party (usually the loser) which make it unreasonable and unfair that the successful party should be out of pocket as a result of the proceedings.
It is unnecessary to traverse the cases in any detail; they demonstrate in one form or another special or unusual circumstances which manifest themselves in improper or unmeritorious conduct by the unsuccessful party as, for example, in cases involving the maintenance of a vexatious claim or defence, the institution and/or maintenance of an action or defence which, while not vexatious or involving an ulterior or collateral purpose, may, on a rational basis, be described as untenable or doomed to failure and cases where a party has conducted its case in wilful disregard of known facts or clearly established law. However, even where there are special or unusual circumstances attaching to a particular case it does not follow as of course that indemnity costs will be awarded. But it may be observed, and the authorities demonstrate, that the categories of special or unusual circumstances justifying indemnity costs are not closed; a too rigid or narrow approach can lead to error in the exercise of the discretion. (See generally on indemnity costs Singleton v Macquarie Broadcasting Holdings Ltd and Qantas Airways Ltd v Dillington (unreported, Supreme Court, 14 May 1987) and Baltic Shipping Co v Dillon (1991) 22 NSWLR 1 at 33 - 35, per Kirby P, Gleeson CJ concurring.