Terms — express and implied

This week moves from formation to content. Weeks 1–3 established the conditions under which an agreement becomes legally binding: offer and acceptance, certainty and intention, consideration and estoppel. The present topic asks a different question: once a contract exists, what precisely has been promised? That question is less mechanical than it first appears. A contractual obligation may be contained in a signed document, in an unsigned notice, in prior dealings, in words spoken during negotiation, in trade usage, in statute, or in a judicially implied incident of the relationship. Conversely, a statement which induced the contract may remain only a representation, generating remedies in misrepresentation rather than contractual damages.

The central architecture is tripartite. First, identify express terms. This requires rules of incorporation: signature, reasonable notice, course of dealing, and the special treatment of onerous or unusual clauses. Secondly, interpret the terms that have been incorporated. Modern English law adopts an objective approach: what would the document convey to a reasonable person with the relevant background knowledge? The familiar tension is between contextual commercial common sense and the discipline of the words actually used. Thirdly, consider implied terms. These may be implied in fact to give effect to the parties’ unexpressed bargain; implied in law as incidents of particular contractual relationships; implied by custom or usage; or implied by statute, particularly in sale of goods, consumer contracts and services.

For Cambridge purposes, the best answers avoid treating incorporation, interpretation and implication as interchangeable. Incorporation asks whether a statement or document is part of the contract at all. Interpretation asks what an incorporated term means. Implication asks whether an additional term should be supplied. The distinction matters because each stage has a different justification and threshold. Courts may interpret language purposively, but they are not licensed to improve a bad bargain. Courts may imply terms, but not merely because the term would be reasonable or because one party wishes it had negotiated better protection.

The topic also rewards careful remedial thinking. A pre-contractual assurance might be a term, a collateral contract, a misrepresentation, or mere sales talk. The classification affects measure of damages, bars to rescission, exclusion clauses, and limitation. In a problem question, the highest marks usually come from disciplined sequencing: formation first, express incorporation, construction, implied terms, breach, then remedies. In an essay, the strongest scripts identify the underlying normative choice: contract law both respects party autonomy and polices the integrity of exchange where parties have not fully articulated their obligations.

The history of terms is a history of movement from formal assent towards objective fairness, and then back towards textual discipline. Nineteenth-century contract law was comfortable with sharp distinctions: if a party signed a contractual document, he was ordinarily bound; if reasonable notice of printed conditions was given, they could bind; if no promise was expressed, the court was slow to manufacture one. This reflected a classical picture of contract as voluntary self-legislation. The court’s function was to enforce the bargain, not to perfect it.

Yet commercial life made that simple picture unstable. Standard terms proliferated through railways, shipping, insurance, banking and later consumer commerce. Parties increasingly contracted by tickets, receipts, forms, catalogues and printed notices. The cases on incorporation are therefore often transport and storage cases: Parker, Thornton, Chapelton, Interfoto. They reveal a judicial anxiety that formal notice may not equate to meaningful assent. The common law response was not a general doctrine of unfair terms, but a set of particular controls: notice had to be reasonable before or at contracting; documents had to be contractual in character; unusual or onerous terms required more prominent warning; and ambiguity might be resolved against the proferens. Statutory controls later did much of the work, but the common law foundations remain examinable.

Implied terms developed along a parallel path. The Moorcock is the canonical commercial case: the court implied a term that a jetty owner had taken reasonable care to ensure a berth was safe. The conventional explanation is business efficacy: the contract would be commercially unworkable without the term. Later cases introduced the officious bystander formula: if an officious bystander had suggested the term at the time of contracting, both parties would have replied that it went without saying. These are not competing tests so much as different ways of expressing necessity. They are stringent because implication in fact is presented as an inference from the parties’ agreement, not a judicial policy choice.

The twentieth century added implication in law. In Liverpool City Council v Irwin the House of Lords implied a term into a tenancy of a tower-block flat that the landlord should take reasonable care to maintain common parts. That implication was not founded on the actual intention of the individual parties. It rested on the nature of the relationship. This introduced a more openly normative form of implication, although courts still insisted upon necessity rather than mere reasonableness.

Interpretation then became the dominant late twentieth-century battlefield. Lord Hoffmann’s restatement in Investors Compensation Scheme emphasised the meaning conveyed to a reasonable person with the relevant background knowledge, not a dictionary-bound literalism. Chartbrook pushed that contextual method far, including correction of drafting errors where the intended meaning was clear. Arnold v Britton and Wood v Capita then cautioned against overusing commercial common sense to rewrite bargains. Marks and Spencer v BNP Paribas reasserted the separation between interpretation and implication. Thus the modern law is not simply contextual or textual. It is objective, contextual where context assists meaning, but constrained by the language, structure and risk allocation chosen by the parties.

This history matters in Tripos answers because it explains the shape of the doctrine. The strictness of signature in L’Estrange sits uneasily with the protective notice cases. The strictness of implication in Marks and Spencer sits uneasily with relational implication in Liverpool. The law is not incoherent, but it is pulled between autonomy, administrability, commercial practicality and protection against surprise.

1. Express terms must be incorporated. A term is not contractual merely because one party wrote it down. Incorporation may occur by signature: a person who signs a contractual document is ordinarily bound by its terms, whether or not read, subject to misrepresentation, fraud, non est factum and statutory control. Incorporation may also occur by reasonable notice. Notice must be given before or at the time of contracting; a term introduced afterwards is too late unless a fresh contract or variation is established. The document must also be one which a reasonable person would expect to contain contractual terms. A receipt or cloakroom ticket may fail this test, whereas an order form, hire agreement or ticket issued in a contractual setting may pass it. Course of dealing can incorporate terms where dealings are regular, consistent and known, but sporadic or equivocal dealings will not suffice.

1. Onerous or unusual terms require particular notice. The more burdensome or unexpected the clause, the greater the steps required to bring it to the other party’s attention. Interfoto is the leading authority. This is not confined to exclusion clauses, though exclusion clauses are common examples. The principle is best understood as part of objective assent: it is unreasonable to infer assent to a surprising liability unless sufficient warning has been given. In problem questions, identify the term’s character before applying the rule. A modest limitation clause in a standard commercial form is different from a punitive holding fee buried in delivery notes.

1. Statements made during negotiation may be terms or representations. Relevant factors include the importance of the statement, the timing between statement and contract, whether the statement was reduced into writing, relative expertise, and whether the maker accepted contractual responsibility. The question is objective. If a car dealer tells a consumer that a car has not been in an accident, that is more readily a term than if an inexperienced private seller repeats a belief. But the categories overlap. The same factual assurance may found misrepresentation and, if promissory, breach of contract.

The leading cases fall into three groups: incorporation, interpretation and implication. On incorporation, L’Estrange v Graucob represents the strict signature rule. A signed contractual document binds even if unread, provided the signature was not procured by fraud or misrepresentation and the document is contractual. Parker v South Eastern Railway supplies the notice analysis for unsigned documents: the issue is whether reasonable steps were taken to bring terms to the passenger’s attention, not whether he actually read them. Chapelton v Barry UDC illustrates the document-character limitation. A deckchair ticket was treated as a receipt rather than a contractual document, so the exclusion clause printed on it was not incorporated.

Interfoto is the modern high point of the notice principle. A particularly onerous holding fee in photographic transparency delivery notes was not incorporated because it had not been fairly and reasonably drawn to the recipient’s attention. The case is doctrinally modest but practically important: ordinary notice rules intensify where the term is surprising or burdensome. It also anticipates statutory unfair terms control while remaining grounded in common law assent.

On interpretation, Investors Compensation Scheme transformed the modern vocabulary. Lord Hoffmann’s principles shifted emphasis from literal meanings to the meaning conveyed to a reasonable person with relevant background knowledge. Chartbrook showed the court’s willingness to correct obvious drafting mistakes as a matter of interpretation, but also reaffirmed the exclusion of prior negotiations as evidence of meaning. Arnold v Britton then rebalanced the field, warning that commercial common sense must not defeat clear language. Wood v Capita is often the best authority for present law: textualism and contextualism are complementary techniques within a single objective exercise.

On implication, The Moorcock remains the classic business efficacy case. The implication was needed to make the contract commercially workable, not to impose fairness at large. Liverpool City Council v Irwin is the key case on implication in law. The landlord’s obligation to take reasonable care of common parts was implied from the nature of the tenancy relationship, not the parties’ actual intention. Attorney General of Belize v Belize Telecom is important because Lord Hoffmann assimilated implication to interpretation, describing both as aspects of determining the instrument’s meaning. Marks and Spencer v BNP Paribas subsequently insisted that this should not dilute the traditional necessity requirement. The safest examination formulation is that implication is related to interpretation but remains a distinct step governed by necessity, obviousness, clarity and consistency with express terms.

A final practical point: cases rarely stand alone. In a problem question about a printed form with a harsh term, cite Parker, Chapelton and Interfoto together. In a problem about a badly drafted commercial contract, cite ICS, Arnold and Wood. In a problem about a missing obligation, cite The Moorcock, Liverpool, Belize and Marks and Spencer, explaining which species of implication is invoked. The mark lies in choosing the right line of authority, not in listing every famous case.

See practice questions section below.

See further reading section below.