The Legal Principles
96Whether or not the parties here intended the agreement to be immediately binding is to be determined objectively having regard to the language contained in the Heads of Agreement. The High Court has repeatedly affirmed this proposition. Allen v Carbone (1975) 132 CLR 528 ; Taylor v Johnson (1983) 151 CLR 422 ; Australian Broadcasting Corporation v XIVth Commonwealth Games Ltd (1988) 18 NSWLR 540; Toll (FGCT) Pty Ltd v Alphapharm Pty Ltd (2004) 219 CLR 165 ; Byrnes & Anor v Kendle (2011) 243 CLR 253 .
97The Heads of Agreement must of course be read in the light of the surrounding circumstances.
98The High Court in Pacific Carriers Ltd v BNP Paribas (2004) 218 CLR 451 said at 462:
The construction of the letters of indemnity is to be determined by what a reasonable person in the position of Pacific would have understood them to mean (26). That requires consideration, not only of the text of the documents, but also the surrounding circumstances known to Pacific and BNP, and the purpose and object of the transaction (27). In Codelfa Constructions Pty Ltd v State Rail Authority of NSW (28), Mason J set out with evident approval the statement of Lord Wilberforce in Reardon Smith Line Ltd v Hansen-Tangen (29):
"In a commercial contract it is certainly right that the court should know the commercial purpose of the contract and this in turn presupposes knowledge of the genesis of the transaction, the background, the context, the market in which the parties are operating."
99In International Air Transport Association v Ansett Australia Holdings Ltd (2008) 234 CLR 151, the High Court remarked at 160:
In giving a commercial contract a businesslike interpretation, it is necessary to consider the language used by the parties, the circumstances addressed by the contract, and the objects which it is intended to secure (18). An appreciation of the commercial purpose of a contract calls for a understanding of the genesis of the transaction, the background, and the market (19). This is a case in which the Court's general understanding of background and purpose is supplemented by specific information as to the genesis of the transaction. The Agreement has a history; and that history is part of the context in which the contract takes its meaning (20).
100As the authors point out in Lewison and Hughes , The Interpretation of Contracts in Australia (2012) at p118:
...the relevant background consists of facts that were actually known to both (or all) parties to the contract, or that are sufficiently notorious that it can be presumed they were so known. Facts which were known to only one of them will not be relevant. Nor is it sufficient to prove that facts were reasonably available, without demonstrating that their availability should lead to an inference being drawn that they were in fact known by both parties. It is, of course, the case that facts which were not known to either party at the date of the contract are not relevant to the construction of the contract, for if the facts were unknown they cannot have played any part in forming the presumed intention which is embodied in the contract. However, where a fact is known to one party and not to the other, in theory it may well have played a part in forming the intention of the party who knew that fact. However, unless a fact is known to both parties, it will not be admitted in evidence, because the court is seeking not the actual intention of one party to the contract, but the presumed mutual intention of both of them.
101Story puts it as follows in A Treatise on the Law of Contracts Not Under Seal , at page 148:
In as much as every contract derives its force from the mutual assent of the parties thereto, to certain terms, it becomes necessary, not only to interpret those terms, in order to ascertain the intention of the parties in entering into the agreement, but also, so to construe them, as to give a legal operation to such intention. The collection of such intention, by inferences from stated terms, or from actual circumstances, or both, is the office of interpretation. The adjustment of such intention to paramount law, is the office of construction.
102If the terms of such a document indicate that the parties intended to be bound immediately, effect must be given to it. Construction of a document may make it sufficiently clear that the parties were content to be bound immediately by the terms to which they had agreed, notwithstanding they contemplated further documentation. Masters v Cameron (1954) 91 CLR 353 at 360; Anaconda Nickel Ltd v Tarmoola Pty Ltd (2000) 22 WAR 101 (per Ipp J at 110).
103As McHugh JA (as he then was) said in G R Securities Pty Limited v Baulkham Hills Private Hospital Pty Limited (1986) 40 NSWLR 631 at 634:
However, the decisive issue is always the intention of the parties which must be objectively ascertained from the terms of the document when read in the light of the surrounding circumstances: Godecke v Kirwan (1973) 129 CLR 629 at 638; Air Great Lakes Pty Ltd v K S Easter (Holdings) Pty Ltd (1985) 2 NSWLR 309 at 332-334, 337. If the terms of a document indicate that the parties intended to be bound immediately, effect must be given to that intention irrespective of the subject matter, magnitude or complexity of the transaction.
Even when a document recording the terms of the parties' agreement specifically refers to the execution of a formal contract, the parties may be immediately bound. Upon the proper construction of the document, it may sufficiently appear that "the parties were content to be bound immediately and exclusively by the terms which they had agreed upon whilst expecting to make a further contract in substitution for the first contract, containing, by consent, additional terms": Sinclair, Scott & Co Ltd v Naughton (at 317).
104McHugh J A also said at 635-636:
Under the agreement each party was obliged to do all that was necessary on his part to enable the other party to have the benefit of the agreement concluded by the correspondence: Secured Income Real Estate (Australia) Ltd v St Martins Investments Pty Ltd (1979) 144 CLR 596 at 607. This included doing everything necessary to enable contracts to be exchanged by 18 April 1986: Godecke v Kirwan (at 641). If the parties agreed on additional terms, they would be added to the formal contract. If they did not, the formal contract would give effect only to the agreed terms and conditions of the correspondence. The case, therefore, is one where the parties were bound by the informal agreement but expected to make a further contract which by consent might contain additional terms: Sinclair, Scott & Co Ltd v Naughton (at 317).
105As Walsh J (with whom Mason J agreed) had earlier pointed out in Godecke v Kirwan (1973) 129 CLR 629 at 639, an agreement which obliges a subsequent agreement to be entered into may contain covenants for example in the new agreement not included in the original contract. In expressing his agreement with the South Australian decision of Bray CJ in Powell v Jones [1968] S.A.S.R. 394, Walsh J accepted that there was no reason in principle for holding that there cannot be a binding contract even if some matter is left to be determined by one of the contracting parties. His Honour took the view that because he was there looking at a clause which permitted the insertion of covenants and conditions (not inconsistent with those contained in the offer), he thought any new terms should also be limited by reference to the reasonableness of requiring the inclusion of those covenants and conditions. He thought that the clause meant that what was required must be reasonable in an objective sense and in the event that there was a dispute it was always a matter for a court to decide.
106The relevant clause the court was concerned with in Godecke was in the following terms:
6. If required by the Vendor/s, I/we shall execute a further agreement to be prepared at my costs by his appointed Solicitors containing the foregoing and such other covenants and conditions as they may reasonably require.
107Gibbs J in Godecke was also of the view the parties may leave terms, even essential terms, to be determined by a third person. In such a case His Honour was of the view that a contract would not be bad for uncertainty because if the third person settled the terms of the contract it would be rendered certain. His Honour said (at page 645):
It is no objection that the power to determine the terms and conditions to be incorporated in the contract is left to the solicitors for one of the parties.
108Gibbs J also referred to the decision of the High Court in Axelsen v O'Brien (1949) 80 CLR 219 in which Latham CJ had found that there had been a concluded contract notwithstanding further terms of the bill of mortgage remained to be arranged or determined by a solicitor. Indeed in that case Latham CJ was of the view that if the solicitor failed to settle the terms not only was that no bar to specific performance but the court in granting specific performance was well able to settle the terms if the solicitor had not done so. Gibbs J did however draw a distinction between an agreement which left further terms to be settled by "one of the parties rather than by his solicitors"(at 646). Gibbs J thought that if one of the parties to a contract was left a discretion as to whether or not he or she would carry the contract out as allegedly agreed then it could not be said that there was a concluded bargain. To delegate however to third parties especially solicitors to implement the agreement is an entirely different matter.
109Where of course the performance of a contract cannot take place without co-operation of both parties it is implied that co-operation will occur. Neither party to a contract is permitted to prevent the other party from performing the contract: Mackay v Dick (1881) 6 App Cas 251.
110Here the Defendants appear to assert that the Heads of Agreement falls within the third category of Masters v Cameron , namely a case in which the intention of the parties was not to make a concluded bargain at all unless and until they executed a formal contract in due course.
111Once a court has however determined that the requisite intention is present it is necessary then to go on to consider whether the contract is so incomplete or uncertain as to be void. It is clear that there can be no binding and enforceable obligation unless the terms of a bargain, or at least its essential terms, have been agreed on. If an essential or critical term is expressly left to be settled by the future agreement of the parties there will be no binding contract. Obscure or ambiguous language incapable of any precise or definite meaning may also be an impediment to finding the parties intended binding contractual relations.
112What is or is not an essential term is sometimes difficult to ascertain. It has been said that a term which is essential is one without which the contract cannot be enforced. Pagnan Spa v Feed Products Ltd [1987] 2 Lloyds Rep 601 per Lloyd LJ at 619.
113Barwick CJ in Upper Hunter County District Council v Australian Chilling and Freezing Co Ltd (1968) 118 CLR 429 (at 436 - 437) said:
But a contract of which there can be more than one possible meaning or which when construed can produce in its application more than one result is not therefore void for uncertainty. As long as it is capable of a meaning, it will ultimately bear that meaning which the courts, or in an appropriate case, an arbitrator, decides is its proper construction: and the court or arbitrator will decide its application. The question becomes one of construction, of ascertaining the intention of the parties, and of applying it. Lord Tomlin's words in this connexion in Hillas & Co. Ltd. v Arcos Ltd. (1) ought to be kept in mind. So long as the language employed by the parties, to use Lord Wright's words in Scammell (G.) & Nephew Ltd. v Ouston (2) is not "so obscure and so incapable of any definite or precise meaning that the Court is unable to attribute to the parties any particular contractual intention", the contract cannot be held to be void or uncertain or meaningless. In the search for that intention, no narrow or pedantic approach is warranted, particularly in the case of commercial arrangements. Thus will uncertainty of meaning, as distinct from absence of meaning or of intention, be resolved.