Grounds (i), (ii), (iv) and (v) raise matters personal to the appellants and can be considered together. Costs are in the absolute discretion of the Court: Federal Court of Australia Act 1976 (Cth), s 43(2). However the usual rule is that costs follow the event, that is to say the successful party will recover costs incurred, assessed on a party and party basis (today this will usually be significantly less than a complete indemnity). Such an order will usually be made even though the losing party acted reasonably in the sense that it had some prospects of success and did not unduly prolong the litigation or otherwise act improperly. Litigation is inherently uncertain and unpredictable. It would be extremely disruptive and time consuming if courts had to determine not only who should win and who should lose, but whether the losing party acted "reasonably". Moreover, and notwithstanding the decision in Oshlack to which we shall shortly turn, the purpose of an order for costs is to compensate the person in whose favour it is made, not to punish the person against whom it is made: Ohn v Walton (1995) 36 NSWLR 77 at 79. As Mason CJ said in Latoudis v Casey (1990) 170 CLR 534 at 543:
"If one thing is clear in the realm of costs, it is that, in criminal as well as civil proceedings, costs are not awarded by way of punishment of the unsuccessful party. They are compensatory in the sense that they are awarded to indemnify the successful party against the expense to which he or she has been put by reason of the legal proceedings".
It follows that lack of blameworthy conduct on the part of the losing party provides in itself no reason for refusal of an order for costs to the successful party.
Likewise the fact that the losing party has very limited financial means is not relevant, any more than it would be in the case of a creditor seeking judgment for a debt otherwise undisputed.
Turning to ground (iii), the supposed "public interest" consideration, it will be necessary to refer briefly to Oshlack. Mr Oshlack brought proceedings in the Land and Environment Court of NSW challenging a council's development approval on the ground that it had been made without adequate consideration of the impact on the local koala population. Stein J dismissed the action but refused the council an order for costs, essentially on grounds that there was a public interest in the outcome of the litigation and that Mr Oshlack had acted reasonably: see 152 ALR at 103-104. The NSW Court of Appeal upheld an appeal by the council and made an order for costs. Mr Oshlack appealed to the High Court which by a majority (Gaudron, Gummow and Kirby JJ, Brennan CJ and McHugh JJ dissenting) reinstated Stein J's order.
However the reasoning in Oshlack is not applicable in the present case. It was a significant factor that Mr Oshlack proceeded under s 123(1) of the Environmental Planning and Assessment Act 1979 (NSW) which provided that "any person" might bring proceedings in the Land and Environment Court for an order to remedy or restrain breaches of the Act. The majority of the High Court considered it would be inconsistent with this conferral of standing on any member of the public to impose a costs penalty on an unsuccessful plaintiff: 152 ALR at 85, 87, 95-96. As Kirby J said (at 122):
"Given that statutory context [of the functions, powers and peculiar procedural provisions governing the Land and Environment Court] and the clear purpose of parliament to permit, and even encourage, individuals and groups to exercise functions in the enforcement of environmental law before the Land and Environment Court, a rigid application of the compensatory principle in costs orders would be completely impermissible. It would discourage, frustrate or even prevent the achievement of parliament's particular purposes."
But the appellants' proceedings in the present case were not founded on any comparable statutory basis. Mr Hollier and his Institute sought to obtain a private benefit, the permanent and indefinite occupation of Deal Island. There was no evidence as to the value or otherwise of the scientific research conducted by the Institute. It was not a relevant issue in the case. As to whether it necessarily had to be conducted on Deal Island, Mr Hollier readily conceded that his research activities could equally be undertaken "in a suburban backyard in Melbourne".
We do not read Oshlack as establishing any general principle that the usual order as to costs should not apply if the subject matter of the litigation is a matter of "public interest". The latter concept is a particularly elusive one. As McHugh J pointed out (152 ALR at 104):
"Without an organising principle to apply or a set of criteria to guide, there is a real danger that, by invoking the 'public interest litigation' factor in cases that affect the public interest or involve a public authority, an award of costs will depend on nothing more than the social preferences of the judge, a dependence that will be masked by reliance on the protean concept of public interest litigation."
See also Australian Conservation Foundation v Forestry Commission (1988) 81 ALR 166 at 171.
In a common law jurisdiction decisions of the courts, in private as well as public law, often clarify the law or lay down new law for the benefit of citizens, taxpayers, traders, patentees, insurers and insureds, landlords and tenants, etc etc. To that extent, much litigation has a public interest going beyond the interests of the parties. But this feature is inherent in common law litigation and provides no ground for departure from the usual rule as to costs. And, as has been pointed out in another context, what interests the public is not necessarily in the public interest: Loveday v Sun Newspapers Ltd (1938) 59 CLR 503 at 513, Morosi v Mirror Newspapers Ltd [1977] 2 NSWLR 749 at 777, London Artists Ltd v Littler [1968] WLR 607 at 619.
As to (v), cost savings by the Authority, the only evidence was that Mr Hollier spent a maximum of $10,000 over five years in return for effectively rent free accommodation. The $400,000 figure was for a manned presence for an operational lighthouse. The lighthouse on Deal Island ceased to operate in 1992 and before Mr Hollier took up occupation. In any event the point is quite irrelevant on the issue of costs.
Finally (vi), the status of the respondents as public bodies of one sort or another is not relevant. They successfully defended a claim which sought the indefinite alienation of land otherwise available for public purposes. The taxpayer should not have to bear the burden. As McHugh J pointed out in Oshlack (at 109):
"Every irrecoverable dollar spent on litigation is one dollar less to spend on the services that public authorities do and ought to provide."