LAW RELATING TO CONSTRUCTION OF CONTRACTS
In Codelfa Construction Pty Ltd v State Rail Authority of NSW (1982) 149 CLR 337, Mason J said at p 352:
'The true rule is that evidence of surrounding circumstances is admissible to assist in the interpretation of the contract if the language is ambiguous or susceptible of more than one meaning. But it is not admissible to contradict the language of the contract when it has a plain meaning. Generally speaking facts existing when the contract was made will not be receivable as part of the surrounding circumstances as an aid to construction, unless they were known to both parties, although, as we have seen, if the facts are notorious knowledge of them will be presumed.'
23 It is common ground that the law to be applied is that stated by Mason J in Codelfa at 352 with which Stephen J agreed, as did Wilson J who also expressed agreement with Aickin J. The effect of this approach is that evidence consisting of 'statements and actions of the parties which are reflective of their actual intentions and expectations …are not receivable': Codelfa at 352.
24 Relevantly to this case Mason J advanced one proposition tentatively in the following terms (at 352 - 353):
'There may perhaps be one situation in which evidence of the actual intention of the parties should be allowed to prevail over their presumed intention. If it transpires that the parties have refused to include in the contract a provision which would give effect to the presumed intention of persons in their position it may be proper to receive evidence of that refusal. After all, the court is interpreting the contract which the parties have made and in that exercise the court takes into account what reasonable men in that situation would have intended to convey by the words chosen. …It is possible that evidence of mutual intention, if amounting to concurrence, is receivable so as to negative an inference sought to be drawn from surrounding circumstances.'
25 In Esso Australia Ltd v Australian Petroleum Agents' & Distributors' Association [1999] 3 VR 642 at 647 Hayne J considered that 'the trend of authority is in favour of receiving evidence of the fact of deletion of an expression if to do so would negative an inference sought to be drawn from surrounding circumstances that the contract bears a meaning positively rejected by the deletion.' He continued: ' in the case of a contract it is possible to examine the facts to see whether there was an actual intention of the parties evidenced by their concurrence in rejecting the deleted words.'
26 The authority of Codelfa was recently reaffirmed by the High Court in Royal Botanic Gardens and Domain Trust v South Sydney City Council (2002) 186 ALR 289 at 301 when in the reasons for judgement of Gleeson CJ, Gaudron, McHugh, Gummow and Hayne JJ it was stated that Australian courts, if they discern any inconsistency between recent English decisions and Codelfa should continue to follow Codelfa until the High Court makes a determination on that issue. The authorities referred to were the speeches of Lord Hoffmann in Investors Compensation Scheme Ltd v West Bromwich Building Society [1998] 1 WLR 896 at 912-913 and Lord Bingham and Lord Hoffman in Bank of Credit and Commerce International SA v Ali [2002] 1 AC 251. The possible point of inconsistency is whether their Lordships would take a broader view of the admissible 'background' than was taken in Codelfa. In Royal Botanic Kirby J said at par [104] that accepting the law on the availability of contextual materials and extrinsic evidence has advanced somewhat in Australia as elsewhere, the position remains that stated by Mason J in Codelfa.
27 In Investment Compensation Scheme at 912-913 Lord Hoffman relevantly said:
'I do not think that the fundamental change which has overtaken this branch of the law, particularly as a result of the speeches of Lord Wilberforce in Prenn v. Simmonds [1971] 1 W.L.R. 1381, 1384-1386 and Reardon Smith Line Ltd. v. Yngvar Hansen-Tangen [1976] 1 W.L.R. 989, is always sufficiently appreciated. The result has been, subject to one important exception, to assimilate the way in which such documents are interpreted by judges to the common sense principles by which any serious utterance would be interpreted in ordinary life. Almost all the old intellectual baggage of "legal" interpretation has been discarded. The principles may be summarised as follows:
(1) Interpretation is the ascertainment of the meaning which the document would convey to a reasonable person having all the background knowledge which would reasonably have been available to the parties in the situation in which they were at the time of the contract.
(2) The background was famously referred to by Lord Wilberforce as the "matrix of fact," but this phrase is, if anything, an understated description of what the background may include. Subject to the requirement that it should have been reasonably available to the parties and to the exception to be mentioned next, it includes absolutely anything which would have affected the way in which the language of the document would have been understood by a reasonable man.
(3) The law excludes from the admissible background the previous negotiations of the parties and their declarations of subjective intent. They are admissible only in an action for rectification. The law makes this distinction for reasons of practical policy and, in this respect only, legal interpretation differs from the way we would interpret utterances in ordinary life. The boundaries of this exception are in some respects unclear. But this is not the occasion on which to explore them.'
In Bank of Credit at 269 he clarified his second proposition as referrable to anything which a reasonable man would have regarded as relevant. The English developments have recently been considered in an article by McMeel ('Prior negotiations and subsequent conduct - The next step forward for contractual interpretation', Law Quarterly Review, vol. 119, 2003, p 272) in which the author advocates liberalisation of interpretive approaches.
28 In Ray Brooks Pty Ltd v NSW Grains Board [2002] NSWSC 1049 Palmer J said the effect of dicta from the majority in Royal Botanic is to leave it to inferior Courts to puzzle out whether the decision in Codelfa is consistent or inconsistent with the contextual approach adopted in West Bromwich. Palmer J had earlier drawn a distinction between 'the two competing schools of thought' as to the point in time at which the Court may look at extrinsic evidence in order to construe a contract. One, 'the literal approach', gives primacy to the words of the document so that the starting point in the task of construction is always the text. The competing approach he described as 'the contextual approach' which holds that the words of a document, being no more than symbols of language, can never be reliably understood in isolation from the context in which the words were used. After analysing the reasoning of Mason J in Codelfa , Palmer J concluded that the approach of Mason J would be in complete sympathy with the contextual approach promoted by Lord Hoffman in West Bromwich. He said at par [59]:
'His Honour is not saying: evidence of surrounding circumstances is admissible only if it first appears that the language of the contract is ambiguous. His Honour is saying: evidence of surrounding circumstances is admissible only for the purpose of explaining ambiguous language in the contract and not for the purpose of changing the meaning of clear words.'
29 On the issue of the point of time in the exercise of construction at which reference to extrinsic evidence is permissible, Palmer J was of the view that Mason J agreed with Lord Wilberforce's approach in Prenn v Simmonds [1971] 1 WLR 1381 and in Reardon Smith Line Ltd v Yngvar Hansen-Tangen (The Diana Prosperity) [1976] 1 WLR 51, the pith of which he considered was that the time has passed when contracts are isolated from the matrix of facts in which they were set and interpreted purely on internal linguistic considerations. Palmer J also referred to the trend of authority on the issue in New Zealand which he considered showed an endorsement and application of the approach in West Bromwich: cf. DW McLauchlan, 'A contract contradiction', Victoria University of Wellington Law Review, vol 30, 1999, p 175.
30 I am unable to agree with Palmer J that Codelfa and the passages in West Bromwich can be viewed as entirely consistent. That is not the way in which I understand the relevant portions of Codelfa have been understood and applied in relation to the issue of whether ambiguity is not to be found until the contract in issue has been considered in the matrix of facts in which it is set. In LMI Australasia Pty Ltd v Baulderstone Hornibrook Pty Ltd [2003] NSWCA 74 the New South Wales Court of Appeal accepted that Australia had kept while England had discarded the concept that ambiguity is necessary to be shown before one looks at the surrounding circumstances: per Young CJ in Eq, Meagher JA and Hodgson JA agreeing. Academic writing has regarded Codelfa as falling far short of Lord Wilberforce's apparent position in Prenn on the issue of admission of surrounding circumstances to determine ambiguity: H King, 'The admissibility of extrinsic evidence as an aid to contract interpretation: pushing objectivity to absurd limits', Corporate and Business Law Journal, vol. 6(2), 1994, p 187. Yet the law on this is arguably not clear-cut given that in Maggbury Pty Ltd v Hafele Australia Pty Ltd (2001) 185 ALR 152 at 155 at par [11] Gleeson CJ, Gummow and Hayne JJ relied upon the statement by Lord Hoffman in Investors Compensation at 912 that the interpretation of a written contract involves 'the ascertainment of the meaning which the document would convey to a reasonable person having all the background knowledge which would reasonably have been available to the parties in the situation in which they were at the time of the contract' and referring by footnote in that context to the reasons of Mason J in Codelfa at 350-352 and Lord Bingham in Bank Credit at 739. Furthermore, it has been said by one Australian text author that 'the practice of the courts is to have regard to surrounding circumstances in the form of the factual matrix in virtually all cases' on the ground that most English words are susceptible of more than one meaning so that difficulty of interpretation is sufficient for that reference to be made: JW Carter, Carter on Contract, Butterworths looseleaf, 2002 at p 28,096 at 12-050.
31 In LMI the Court of Appeal accepted, however, that the Codelfa doctrine appeared 'to be not only that a court uses the surrounding circumstances to aid its interpretation and to put itself in the armchair of the parties to look to see what each knew when it was making the contract, but also that inferences can be drawn from the surrounding circumstances virtually to add terms': at par [45] citing Codelfa at 353. Of such circumstances the Court of Appeal stated at [44] that 'the approach in the Royal Botanic Gardens case itself shows that there is, in fact, a tendency to glean much more from negotiations as surrounding circumstances in Australia than would be permitted in England.' It may be that there is good reason for the approach in Codelfa to be re-examined both in terms of the appropriateness of the approach and in the light of developments in other common law jurisdictions on the issue. However, given the unequivocal statement by the majority in the High Court in Royal Botanic and the factors I have just referred to, I consider I should proceed on the basis there is not consistency between Codelfa and West Bromwich.
32 At the risk of repeating what is said in Codelfa, it follows that the issues arising in this matter should be approached in the following manner.
33 It is necessary firstly to determine whether the contract has a plain meaning or contains an ambiguity. If the contract has a plain meaning, evidence of 'surrounding circumstances' will not be admissible to contradict the language of the contract. If the language of the contract is 'ambiguous or susceptible of more than one meaning' evidence of 'surrounding circumstances' is admissible to assist in the interpretation of the contract.
34 The concept of 'surrounding circumstances' is to be understood to be a reference to 'the objective framework of facts'. It will include evidence of prior negotiations so far as they tend to establish objective background facts known to both parties and the subject matter of the contract. It will also include facts so notorious that knowledge of them is to be presumed. Additionally it will include evidence of a matter in common contemplation and constituting a common assumption. From the evidence of that setting the parties' presumed intention may be taken into account in determining which of two or more possible meanings is to be given to a contractual provision. What cannot be taken into account is evidence of statements and actions of the parties which are reflective of their actual intentions and expectations. Objective background facts can include statements and actions of the parties which reflect their mutual actual intentions. That is, evidence of the mutual subjective intention of the parties to a contract may be part of the objective framework of facts within which the contract came into existence. It is the mutuality which makes the evidence admissible.
35 I accept the submission for the applicant that the presence of cl 68 does not preclude the application of the above principles and takes effect only in relation to the contractual obligations when the extent of them is known as a consequence of the interpretation of the contract in issue.