27 Both the Base Grape Values, or Variety Prices, and the Grape Value Grade scales increased in every year of the Initial Period. It was submitted on behalf of the plaintiff that the Grape Value Grade scales increased by a rounded amount of 3 per cent in each year of the Initial Term. This is conceded by the defendant.
28 A Grade Premium is to be calculated by reference to the three elements of the Grade Premium formula set out in cl. 6.3. The first element is the Base Grape Value Grade. The definition of this term in cl. 26.1 of the terms and conditions indicates that the same Base Grape Value Grade is to apply in both the Initial Term and the Option Term. This follows from the definition of "Term" in cl. 21.1 of the terms and conditions.
29 The second element of the Grade Premium formula is the Vintage Grape Value Grade of the relevant parcel of grapes, as determined by Southcorp.
30 The third element of the Grade Premium formula is the Grape Value Grade scale. Clause 6.3 of the terms and conditions provides that this element is that "set out in" the Pricing Details schedule.
31 For example, the calculation of a Grade Premium for a parcel of chardonnay grapes supplied in 1998 with a grade of 9 would be as follows:
(9 - 7) x 63 = $126.
This calculation is possible during the Initial Term, because the Pricing Details schedule sets out the Grape Value Grade scales for each variety of grapes in each Vintage Year of the Initial Term.
32 However, the Pricing Details schedule does not set out a Base Grape Value Grade or a Grape Value Grade scale in respect of any variety of grapes for any Vintage Year in the Option Term. All that appears in the Pricing Details schedule for the Option Term is a reference to an "Option Term Minimum Price" per tonne of grapes. Reference to cl. 2.7.1 of the terms and conditions indicates that this is intended to be the Variety Price, or Base Grape Value, for the whole of the Option Period in the absence of contrary agreement.
INTERPRETATION OF THE AGREEMENT
33 The question arises as to whether, on a proper construction of the Agreement, the parties intended that a Grade Premium would be payable during the Option Term. The relevant principles of contractual interpretation are not in doubt. The meaning of a commercial contract is to be determined objectively, by reference to what a reasonable person in the position of the parties would understand the language used in the contract to mean.[5]
34 On behalf of Southcorp, it was submitted that the omission from the Pricing Details schedule of any Grape Value Grade scale for the Option Term indicates that the parties considered whether a Grade Premium would be payable in respect of grapes supplied during the Option Term and decided that no such premium would be payable. If they had intended that such a premium would be payable, it would have been a simple matter to specify in the Pricing Details schedule a Grape Value Grade scale for each year of the Option Term in respect of each grape variety. The fact that the parties have chosen to specify only that the sum of $600 will be payable as the "Option Term Minimum Price" per tonne indicates an unambiguous intention that no Grade Premium is payable during the Option Term.
35 On behalf of the plaintiff, it was submitted that, when the Agreement is construed as a whole, it discloses an objective intention that the quality of the grapes to be supplied by the plaintiff was of critical importance to Southcorp. This obvious intention is discernable from the many terms of the Agreement concerning quality issues. Based upon this objective purpose, it was submitted on behalf of the plaintiff that the Court should give primacy to the intention expressed in cll. 2.7, 5.1 and 6.1 of the terms and conditions, which state that Southcorp will pay a Grade Premium in each Vintage Year of the operation of the Agreement, including during the Option Term. Having regard to the obvious intention expressed in these clauses that a Grade Premium would be payable during the Option Term, it was submitted that the Court should strive to construe the Agreement to make it work. The suggested approach was that the Court should attribute to the parties an intention that the Grape Value Grade scale for the Initial Term should be extrapolated at the rate of 3 per cent per annum throughout the Option Term.
36 It was also submitted on behalf of the plaintiff that this approach should be adopted because the interpretation suggested by the defendant would lead to a result which was capricious, unreasonable, inconvenient or unjust. It was submitted that this result would follow because the clear purpose of the pricing structure in the Agreement was to reward good quality grapes and punish bad quality grapes. An interpretation which involved no Grade Premium being payable during the Option Term would have the effect that any reward for good quality fruit would vanish.
37 I reject the arguments advanced on behalf of the plaintiff. In my view, they involve the Court in re-writing the Pricing Details schedule so as to attribute to the parties an intention for which they have not made any provision.[6] The Grade Premium formula requires, for its operation, a Grape Value Grade scale to be set out in the Pricing Details schedule. It would have been a simple matter for the parties to include a Grape Value Grade scale for the Option Term in the Pricing Details schedule if that was their intention. They have not done so. Instead, there is a simple reference to "Option Term Minimum Price" per tonne for the Option Term. This is to be contrasted with the detailed specification in the Pricing Details schedule of a Grape Value Grade scale for each Vintage Year in the Initial Term.
38 I accept that a less obvious interpretation of the words of an agreement may be adopted where the result is properly characterised as capricious, unreasonable, inconvenient or unjust.[7] However, the result of the interpretation of the Agreement which I prefer in this case is not, in my view, capable of being so characterised. However, even if it were, there are no words or figures in the Pricing Details schedule or in the Agreement which are capable of supplying the Grape Value Grade scale for the Option Term. In short, there is no alternative interpretation open, merely the suggestion that the Court should guess what the parties would likely have agreed if they had chosen to express Grape Value Grade scales for the Option Term. In my view, that is not a proper role for the Court in the interpretation of an agreement. In this regard, I adopt the statement of Lord Mustill in Charter Reinsurance Co Ltd v Fagan[8] concerning the interpretation of commercial agreements where it is suggested that a particular interpretation leads to an unreasonable result: