Contract Law Essentials: A Comprehensive Guide to Key Concepts

Posted on Apr 27, 2024 in Law & Jurisprudence

Contract Law Essentials

Consideration

Consideration is a crucial element of a valid contract. It must be either executed (promise performed at contract formation) or executory (mutual promises to be performed in the future). Past consideration, where performance is completed before the promise, is generally not valid.

Executed Consideration

Executed consideration is common in unilateral contracts, where one party makes a promise in exchange for the other party’s act. For example, offering a reward for finding a lost pet.

Executory Consideration

Executory consideration involves mutual promises to be fulfilled in the future, typical in bilateral contracts. For instance, an agreement to buy and sell goods involves promises from both the buyer and seller.

Past Consideration

Past consideration is usually not valid as it does not involve an exchange of value at the time of contract formation. A promise to pay for services already rendered without prior agreement is not binding.

Privity of Contract

Privity of contract dictates that only the parties involved in a contract are bound by its terms. Third parties cannot enforce or be held liable under the contract.

Capacity to Enter into Contract

Minors

In Hong Kong, individuals under 18 are considered minors. While they can enforce contracts against adults, adults have limited ability to enforce contracts against minors, except for necessaries like essential goods, education, or services provided at a reasonable price.

Mental Disability

Individuals with mental disabilities, under the influence of drugs or alcohol, may lack capacity to contract if they cannot understand the terms and the other party is aware of their incapacity.

Illegal Contracts

Contracts for illegal purposes, such as committing a crime, corruption, or trading with enemies during wartime, are invalid and unenforceable.

Terms of a Contract

Contract terms define the rights and obligations of the parties. They can be express (explicitly agreed upon) or implied (presumed by law or custom).

Representations

Representations are statements of fact that induce a party to enter a contract but may not be terms of the contract itself. The distinction between a term and a representation depends on factors like the timing and importance of the statement.

Categories of Terms: Conditions and Warranties

Conditions

Conditions are fundamental terms of a contract. A breach of condition allows the innocent party to terminate the contract and/or claim damages.

Warranties

Warranties are less critical terms. A breach of warranty entitles the innocent party to claim damages but not terminate the contract.

Express Terms

Express terms are explicitly agreed upon by the parties, either verbally or in writing.

Implied Terms

Implied terms are not explicitly stated but are understood to be part of the contract based on:

  • Previous dealings between the parties
  • Business efficacy (terms necessary for the contract to function effectively)
  • Custom and trade usage
  • Legislation (e.g., Sale of Goods Ordinance)

Exemption Clauses

Exemption clauses limit or exclude a party’s liability under a contract. To be effective, they must:

  1. Have clear and unambiguous wording
  2. Be incorporated into the contract
  3. Comply with the Control of Exemption Clauses Ordinance (Cap. 71)

The Control of Exemption Clauses Ordinance restricts the use of exemption clauses for personal injury or death caused by negligence and requires reasonableness for clauses related to property damage.

Relevant Cases

  • Carlill v Carbolic Smokeball Co (1893): Unilateral contracts and definite promises in advertisements
  • Fisher v Bell (1961): Shop window displays as invitations to treat
  • Stevenson, Jacques & Co. v Mclean (1879-80): Requests for information and offer acceptance
  • Powell v Lee (1908): Acceptance communication by authorized agents
  • Dickinson v Dodds (1875-1876): Revocation of offers
  • Adams v Lindsell (1818): Postal rule of acceptance
  • Chappell & Co Ltd v Nestle Co Ltd (1960): Adequacy of consideration
  • Stilk v Myrick (1809): Performance of existing duty as consideration
  • Williams v Roffey Bros & Nicholls (Contractors) Ltd (1991): Practical benefit and consideration
  • Roscorla v Thomas (1842): Past consideration
  • Pinnel’s Case (1601): Part payment of debt and consideration
  • Central London Property Trust Ltd v High Trees House Ltd (1947): Promissory estoppel
  • The Moorcock (1889): Business efficacy test for implied terms
  • Olley v Marlborough Court Ltd (1949): Notice of exemption clauses
  • Always Win Ltd v Autofit Ltd (1995): Reasonableness of exemption clauses

Relevant Hong Kong Ordinances

  • Cap 26 Sale of Goods Ordinance section 16: Merchantable quality
  • Cap 71 Control of Exemption Clauses section 7(1): No exemption for death or personal injury
  • Cap 71 Control of Exemption Clauses section 7(2): Reasonableness of exemption clauses for property damage