Uncertainty of the 2003 Plan
7The plaintiffs first argue on costs that the 2003 Plan did not provide the necessary certainty for determining the plaintiffs' entitlement under the formula in clauses 25C and 25D, particularly in the circumstances that faced the plaintiffs where there were different activation dates for each of their bores.
8The plaintiffs argued that: (1) although the 2003 Plan, Schedule 4 set out general rules in relation to the calculation of the conversion from entitlements under the 1912 Act to the corresponding share component under the 2000 Act WAL and SWAL, those rules were not sufficiently precise to overcome the uncertainty in the calculations for multiple bores in the 2003 Plan; and, (2) even r 10 in Schedule 4 was insufficient to overcome this imprecision, because the words "amalgamated" and "amalgamation" are nowhere defined in the 2003 Plan.
9The plaintiffs submit that the 2003 Plan, a document of critical importance in the legislative scheme, and the public document on which the parties should have been expected to rely, lacked the necessary precision to allow the plaintiffs to calculate their entitlement under the cl 25C formula. Relying upon statements of the High Court in Oshlack v Richmond River Council (1998) 193 CLR 72; [1998] HCA 11 ("Oshlack") at [69], the plaintiffs submit that given this lack of precision "it was inevitable that there would be tension between the competing methodology of the plaintiffs, as against [that of] the defendants, which would have the effect of inviting litigation".
10In Oshlack the High Court explained the traditional exceptions to the usual order for costs in the following way, at [69]:
"The traditional exceptions to the usual order as to costs focus on the conduct of the successful party which disentitles it to the beneficial exercise of the discretion. In Anglo-Cyprian Trade Agencies Ltd v Paphos Wine Industries Ltd [1951] 1 All ER 873 at 874. Devlin J formulated the relevant principle as follows:
'No doubt the ordinary rule is that, where a plaintiff has been successful, he ought not to be deprived of his costs, or, at any rate, made to pay the costs of the other side, unless he has been guilty of some sort of misconduct.'
'Misconduct' in this context means misconduct relating to the litigation (King & Co v Gillard & Co [1905] 2 Ch 7; Donald Campbell & Co Ltd v Pollak [1927] AC 732 at 812), or in the circumstances leading up to the litigation (Bostock v Ramsey Urban District Council [1900] 2 QB 616). Thus, the court may properly depart from the usual order as to costs when the successful party by its lax conduct effectively invites the litigation (Jones v McKie [1964] 1 WLR 960; [1964] 2 All ER 842; Bostock [1900] 2 QB 616 at 622, 625, 627); unnecessarily protracts the proceedings (Forbes v Samuel [1913] 3 KB 706); succeeds on a point not argued before a lower court (Armstrong v Boulton [1990] VR 215 at 223); prosecutes the matter solely for the purpose of increasing the costs recoverable (Hobbs v Marlowe [1978] AC 16); or obtains relief which the unsuccessful party had already offered in settlement of the dispute (Jenkins v Hope [1896] 1 Ch 278). "
11The plaintiffs contended that although the Court ultimately rejected the plaintiffs' construction of the term "amalgamated" (see the principal judgment at [118]), and preferred the defendants' construction (principal judgment at [120]), the defendants' successful approach to the construction of the provisions was only first expressed in its Defence filed on 12 August 2011, was not expressed to the plaintiffs before the commencement of the proceedings, and was certainly not expressly provided for in the 2003 Plan itself. As the uncertainty in the 2003 Plan was the defendants' responsibility, the plaintiffs submit that the defendants should not have their costs of the proceedings.
12But the defendants' answers to these arguments are persuasive. First, a successful party should not ordinarily be deprived of costs, unless that party has been guilty of misconduct "relating to the litigation or the circumstances leading up to the litigation": Oshlack at [69]. It is difficult to see how the making of delegated legislation in the form of a the 2003 Plan is "conduct relating to the litigation or the circumstances leading up to the litigation". The drafting and promulgation of delegated legislation which does not define every term used, and which admits more than one interpretation is common place, is not readily to be characterised as "misconduct" within this principle in Oshlack. This was an ordinary contest about the construction of the wording in statute, where both meanings were maintainable. Drafting legislation or contracts with debatable meaning is hardly to "invite" litigation in the sense which would deprive a party of legal costs. Cases concerning misconduct within this Oshlack principle generally concern deliberate or unreasonable behaviour which either protracts or increases the cost of litigation, whatever its outcome: Oshlack at [69]. No foundation for such conduct has been made out against the Minister.
13Another related difficulty with the plaintiffs' argument is that although the 2003 Plan was a Minister's plan under the 2000 Act, s 50, the consequences of inadequacy of the plan cannot be sheeted home entirely to the Minister. The intensive process of consultation mandated by the 2000 Act, Part 3, and followed in this case, means that responsibility for any imprecision in the 2003 Plan would also be shared with the local Lower Murrumbidgee Water Management Committee. And the result that was achieved in this case is in part dependent upon the operation of the 2004 Regulation, s 29B, which was the responsibility of Parliament, not the Minister. It seems to me that a finding of relevant "misconduct" attracting this Oshlack principle is not maintainable in these circumstances.
14Secondly, the 2003 Plan was not ultimately uncertain. All that has occurred in this case is that as a result of a routine, although complex, exercise in statutory interpretation, the meaning of the 2003 Plan has been construed. Nor was any uncertainty in the 2003 Plan, such as failing to define the words "amalgamated" and "amalgamation" in rule 10, sufficiently remarkable that it should justify depriving the successful defendants of their costs on the basis that it "invited litigation", as the plaintiffs allege.
15Thirdly, to the extent that there is any uncertainty in the word "amalgamated" in Schedule 4. Rule 10, the defendants did clearly plead and submit what they meant by "amalgamated" in the 2003 Plan. The Court simply gave a meaning to "amalgamated" which accorded with the defendants' pleading and submissions: principal judgment at [117].
16Fourthly, even if the meaning of the word "amalgamated" in the 2003 Plan were debatable in 2003, Jagot J had already decided Green v Minister for Climate Change, Environment and Water [2008] NSWLEC 48 ("Green") over a year before the plaintiffs commenced the present proceedings in 2009. Green concerned a plan for different groundwater sources but, nevertheless, a plan which was relevantly indistinguishable from the 2003 Plan. As a result of Green, the scheme and operation of the 2003 Plan and 2004 Regulation was clear, and much of the uncertainty of which the plaintiffs now complain had been removed: as the principal judgment makes clear, at [114] and [149].
17In the later costs arguments in Green, Jagot J declined to award costs to the Minister, because in making the plan in that case and refusing to correct an acknowledged error in the plan the Minister "effectively invited the proceedings: Green v Minister for Climate Change, Environment and Water (No. 2) [2008] NSWLEC 133 ("Green - No. 2"). But there was no acknowledged and uncorrected error by the Minister in these proceedings, as there had been in Green - No. 2.