"The institution and conduct of the interlocutory proceedings were necessitated by Leduva's failure to comply with its obligations under the deed. There could be no doubt, and I find, that these costs are within the terms of sub cl (b)(i) being Railcorp's legal costs incurred in enforcing the deed."
15 I accept that the plaintiff's undertaking as to damages was inextricably linked to the granting of the interlocutory injunction, Nicholas J's reasoning is equally applicable to the plaintiff's costs of opposing enforcement of its undertaking. Put another way, if the plaintiff's costs of obtaining and sustaining the interlocutory injunction were legal costs incurred in enforcing the Deed, the plaintiff's costs of resisting enforcement of the undertaking [that was necessarily attendant upon the obtaining of the interlocutory injunction] must also meet that description. Accordingly, and as the plaintiff has submitted, like the former costs, the latter costs fall within subparagraph (b)(i) of Schedule 1 of the Deed.
16 Finally, I accept that insofar as subparagraph (b)(ii) of Schedule 1 of the Deed is concerned, the subject costs are "Rail Party's costs in…otherwise dealing with the Developer…under or in connection with this Deed." The Deed set out the rights and obligations of the plaintiff and the defendant as between each other in respect of the development. The interlocutory injunction was clearly granted by reason of the defendant's failure to comply with its obligations under the deed. The costs of, and incidental to, the obtaining and continuance of the injunction were, at least, "in connection with" the Deed; those being words of wide import [see, for example, Brown v Rezitis (1970) 127 CLR 157 at 165 and Tana v Baxter (1986) 160 CLR 572 at 579].
17 For these reasons, the costs of defending an action to enforce the undertaking as to damages attendant upon the injunction are in no different position.
Entitlement to indemnity costs
18 The plaintiff's costs of defending the defendant's claim to enforce the undertaking as to damages fall within the definition of "Rail Party's Costs" under the Deed. Hence the principled exercise of the relevant discretion is to make an indemnity costs order in favour of the plaintiff. This follows because, as Nicholas J held, the plaintiff's entitlement to costs under the Deed is an entitlement to payment of costs on an indemnity basis. I accept that there is no reason which justifies departure from the ordinary rule that it is usually appropriate to exercise the costs discretion so as to give effect to a contractual right to indemnity costs. One has to recall my own finding that the application to enforce the plaintiff's damages undertaking should be dismissed because of special circumstances which "critically included 'the conduct of the injunctee'" (at [92]). This underpins the fact that the costs discretion is appropriate to be exercised so as to reflect the plaintiff's right under the Deed to indemnity costs. As the plaintiff contends, this outcome is also consistent with Nicholas J's conclusion that the plaintiff "should bear no costs by reason of the carrying out of the development" [that is at [25] of the Costs Judgment].
Interest on costs
19 Subsection 101(4) of the Civil Procedure Act 2005 ("the Act") provides: