Decision
34 In my opinion, no error is shown in the reasoning of the primary judge, with which I generally agree.
35 I accept Mr Meagher's submission that the Asset Sale Deed does not specify the NCIG Arrangements, or rights thereunder, as being included in the assets sold by that agreement; but that does not significantly support the view that the agreement manifests an intention that Mangoola was to pay more for whatever it was to receive under cl 8.6. Plainly, in my opinion, if reasonable endeavours could have brought about a novation through agreement of the other parties to the NCIG Arrangements, without the need for any payment, Mangoola should have received the benefit of that novation without having to pay any more for rights under the NCIG Arrangements. It was a common understanding of the parties at the time of the Asset Sale Deed that the agreement of other parties to the NCIG Arrangements to such a novation could not then be obtained; but in my opinion that was insufficient to justify reading the requirement that Mangoola use reasonable endeavours as extending to a requirement that it pay some additional price.
36 In the implementation of the pre-emption provisions, a price that might be offered by Mangoola would not be a basis for proceeding with the pre-emption process unless Centennial was prepared to accept that price. There is no market for the rights and obligations under the NCIG Arrangements and no apparent basis for determining what would be a reasonable price which Mangoola would be required to offer as part of reasonable endeavours on its part, or which Centennial would be expected to accept as a result of reasonable endeavours on Hunter's part. And since it could be anticipated that other NCIG participants, who included BHP controlled companies, might be prepared to exercise pre-emptive rights if the price was "reasonable" (whatever that might mean) to give them a competitive advantage over Xstrata, it is in my opinion more difficult still to determine what price "reasonable endeavours" would require Mangoola to offer. This fundamental uncertainty counts against the construction argued for by Mr Meagher.
37 I accept Mr Meagher's submission that reasonable endeavours may require action that is not assured of success, and may in some circumstances require action that has not a better than even chance of success; but this would rarely be so if lack of success would mean total loss of the asset sought to be transferred. This consideration applied particularly strongly in this case, where there is a positive obligation imposed by cl 8.6(c) to preserve the asset.
38 There is some force in Mr Meagher's contention that there is no spelling out in cl 8.6(c) of any entitlement of Centennial to be indemnified against loss from undertaking whatever commitments or liabilities might be required by cl 8.6(c)(4). However, in my opinion that concern is met by the fact that what cl 8.6(c) requires is only that Centennial "use reasonable endeavours" to make the capacity referred to in cl 8.6(c)(4) available; and for Centennial to do what was required to make that capacity available to Mangoola without Xstrata and/or Mangoola giving appropriate undertakings and/or indemnities would in my opinion go beyond "reasonable endeavours".
39 The view of the primary judge has further support from the consideration that the obligation under cl 8.6(c)(4) to "make available capacity" suggests that the parties envisaged that this obligation could still be in force when the NCIG terminal came into service and for some time thereafter, in circumstances where it was not expected that the NCIG terminal would come into service until the second half of 2009. This counts against cl 8.6(c) being regarded as a temporary measure simply to support cl 8.6(b). Mr Meagher submitted that cl 8.6(c)(4) related to supporting Centennial's entitlement to the capacity during an interim period; but the language used is that capacity be made available, suggesting an intention that the provision operate when the capacity is there to be made available.
40 Another reason counting against Mr Meagher's submission is that what cl 8.6 contemplates is novation of rights and obligations as well as transfer of shares; and novation means the making of a new agreement by existing parties and a new party. A mere transfer of rights following implementation of the pre-emption provision would not be a novation at all; and thus engaging in the pre-emption process would not be using reasonable endeavours to achieve a novation, but rather would be using endeavours to achieve something else other than a novation.
41 Although it is not necessary to have regard to pre-contractual correspondence or post-contractual correspondence, in my opinion this gives further support to the primary judge's view.
42 As regards pre-contractual correspondence, it can at most be used as part of the objective circumstances known to the parties against which the intention manifested by their signing of the agreement is to be understood. One circumstance is that Xstrata made an offer to purchase assets including Centennial's interest in the NCIG project, and that after the restraint on transfer of that interest was made known, there was a further offer from Xstrata at a slightly higher price, on the basis that there would be further discussions to find a mutually acceptable solution. This tends to support an inference that cl 8.6 was that mutually acceptable solution.
43 As regards post-contractual correspondence, this bears on Mr Meagher's submission that it could not have been intended that cl 8.6(c)(4) operate indefinitely into the future, because this would be uncommercial. Arguments as to interpretation of contracts based on uncommerciality must, in my opinion, turn at least in part on what the Court thinks the common understanding of the parties as to the commerciality of the arrangement was at the time it was entered into, which would reflect back on to what understanding was manifested by their conduct. If that is right, then evidence going to the parties' common understanding at a later time as to the commerciality of the arrangement, on the relevant construction of it, would be relevant to their actual common understanding at the time of the contract, relevant in turn to what understanding was manifested by their conduct, and thus relevant to arguments based on considerations of commerciality. Centennial's letter of 29 November 2007 and Xstrata's response to it indicate a common understanding that it was not uncommercial for Centennial to undertake commitments so as to make available to Mangoola capacity at the NCIG terminal, on the basis of appropriate reciprocal commitments by Xstrata; and this in my opinion further undermines Mr Meagher's arguments based on considerations of uncommerciality.
44 For those reasons, in addition to the reasons advanced by the primary judge, in my opinion the construction adopted by the primary judge was correct. It is accordingly unnecessary to consider submissions concerning the effect of breach of cl 8.6.