Is Codock not entitled to reimbursement of Costs to the extent that (the Commonwealth contends) the risk of such Costs was carried by Codock because insurance premiums against the risks of personal injury claims were reimbursed by the Commonwealth?
15 The Commonwealth's argument is based on certain clauses of the 1984 Standard Conditions that deal with the acceptance into overhead of certain kinds of insurance premium. The Commonwealth wishes to argue that, where those premiums were accepted into overhead, the clauses on their proper construction impose on Codock responsibility for the costs of the risks insured by those policies. Thus, the Commonwealth wishes to argue, where premiums for policies insuring Codock against its liabilities under the Workers Compensation Acts 1919 or 1987 and at common law have been accepted into overhead, the cost to Codock of those liabilities (to the extent that they are not borne by the relevant insurer) are not to be taken into overhead and, therefore, are not payable or reimbursable by the Commonwealth to Codock.
16 Codock submits that this was an argument that would have been an answer to significant parts of its claim in the arbitration. It submits that the amount awarded to it by the arbitrator included substantial amounts for which the Commonwealth, if its present construction of the relevant clauses of the 1984 Standard Conditions were correct, would not have been liable. Thus, Codock submitted, there was an issue estoppel.
17 The Commonwealth's primary submission was that, having regard to my earlier reasons, it was not open to Codock to take this point (or, indeed, the point taken - to the extent that it continued to be pressed - in relation to any of the other issues with which these reasons are concerned). Mr P T Taylor SC, who appeared with Mr D A Caspersonn of Counsel for the Commonwealth, submitted that I had dealt with the estoppel issue in my earlier reasons and that I had there defined the extent to which the doctrine of issue estoppel should apply.
18 I do not accept that submission. I answered the general question as to issue estoppel (issue 1) "no". That was because, on any basis, there were particular defences available to the Commonwealth - if only, as to the quantification of particular elements of the current claim. Mr Taylor accepted that this was so (T 8.38). At the same time, I made it clear that there were particular issues - more accurately, particular defences - that the Commonwealth was estopped, by issue estoppel arising from the arbitrator's award, from raising. When I referred to those in my reasons, I did not intend to give an exhaustive list; nor do I think it is a fair inference from what I said that I was attempting to do so. I therefore think that it is open to Codock to submit, as it has done, that the doctrine applies to other defences sought to be raised by the Commonwealth.
19 As I noted in para [2] of my earlier reasons, Codock was either uninsured or only partially insured for some of the claims brought against it by workers. Its case, both before the arbitrator (in relation to workers' compensation claims up until the final cut off date to which the award extended) and in these proceedings (for such claims after that cut off date), was that the costs of such claims, to the extent that they were uninsured, should be accepted into overhead. The consequence, Codock said and says, is that it was and is entitled to be indemnified for those costs to the extent that they were uninsured.
20 It is, I think, clear that Codock's claim in the arbitration, in so far as it related to overhead, included a claim for costs of the relevant kind over and above the amount of indemnity (if any) recovered by Codock from insurers pursuant to relevant policies of insurance. The Commonwealth did not, in its defences to the claim for overheads made against it in the arbitration, raise a defence of the kind now propounded by issue 3(h).
21 In Henderson v Henderson (1843) 3 Hare 100 (67 ER 313), Sir James Wigram V-C at 115 (319) dealt with the situation where a party to litigation had failed to bring forward its whole case, and sought in subsequent litigation to open a matter that could have been brought forward in the earlier litigation. He said that the court required parties, except under special circumstances, to bring forward their whole case; and that the plea of res judicata (sic) would apply not only to points actually decided by the Court but to points which could have been brought forward but were not:
"[W]here a given matter becomes the subject of litigation in, and of adjudication by, a Court of competent jurisdiction, the Court requires the parties to that litigation to bring forward their whole case, and will not (except under special circumstances) permit the same parties to open the same subject of litigation in respect of matter which might have been brought forward as part of the subject in contest, but which was not brought forward, only because they have, from negligence, inadvertence, or even accident, omitted part of their case. The plea of res judicata applies except in special cases, not only to points upon which the Court was actually required by the parties to form an opinion and pronounce a judgment, but to every point which properly belonged to the subject of litigation, and which the parties, exercising reasonable diligence, might have brought forward at the same time."
22 That statement of principle was analysed in Port of Melbourne Authority v Anshun Pty Ltd (1981) 147 CLR 589. At 598-599, Gibbs CJ and Mason and Aickin JJ noted that the application of the principle "to cases of issue estoppel is to be treated with caution".
23 Their Honours reviewed the authorities and, at 602 to 604, stated the following principles: