Notes on Capacity & Privity in Contract Law

LAWS1000 INTRODUCTION TO CONTRACT LAW

Module 8: Capacity & Privity

Context
  • Key Questions:
      - Can minors, mentally ill, or intoxicated individuals make contracts?
      - What occurs if these individuals attempt to enter into contracts?
      - Can third-party beneficiaries enforce a contract?
  • Formula for Enforceable Contract:
      - Agreement + Consideration + Intention + Certainty + Formalities + Capacity = Enforceable Contract
      - Privity determines who can enforce the contract.
Learning Outcomes
  • Outcomes related to understanding contracts, capacity, and privity will be outlined.
Readings and Key Cases
Readings
  • Chapter 7 — Capacity
      - [7.10]–[7.80]: Minors
      - [7.160]–[7.200]: Mental Incapacity / Intoxication
  • Chapter 8 — Privity
      - [8.10]–[8.190]: Privity of Contract
Key Cases
  • Nash v Inman
  • Roberts v Gray
  • Hamilton v Lethbridge
  • De Francesco v Barnum
  • Scarborough v Sturzaker
  • Hall v Wells
  • Imperial Loan Co v Stone
  • Blomley v Ryan
  • Coulls v Bagot’s
  • Trident v McNiece
  • Hobart International Airport v Clarence CC
Recommended Texts
  • Prescribed Text:
      - M F Cheong, Australian Contract Law: Principles and Cases (2nd ed, Lawbook Co, 2025)
        - Chapters 7 (Capacity) and 8 (Privity)
  • Other Texts:
      - JW Carter, E Peden & GJ Tolhurst, Contract Law in Australia (8th ed, LexisNexis, 2023)
        - Ch 15 (Capacity) | Ch 16 (Privity)
      - HAJ Ford, RP Austin & IM Ramsay, Ford, Austin and Ramsay’s Principles of Corporations Law (12th ed, LexisNexis, 2005)
        - Corporate capacity (s 124 Corporations Act)
      - J Thomson, L Warnick & K Martin, Commercial Contract Clauses: Principles and Interpretation (2nd ed, Lawbook Co, 2016)
        - Ch 5 — Privity and Himalaya clauses in commercial context
Recommended Articles
  • Capacity:
      - DJ Harland, ‘The Contractual Capacity of Minors’ (1973) 7 Syd LR 1
  • Privity:
      - P Kincaid, ‘Privity and the Essence of Contract’ (1989) 12 UNSW LJ 59
      - P Kincaid, ‘The Trident Insurance Case: Death of Contract?’ (1989) 2 JCL 160
      - L Wilson, ‘Contract and Benefits for Third Parties’ (1987) 11 Syd LR 230
      - M Giancaspro, ‘Lowering the Privity Bar’ (2023) SSRN
      - A Carter & A Stewart, ‘Commerce and Conscience’ (1993) 23 UWALR 49
      - A Rogers, ‘Contract and Third Parties’ in PD Finn (ed), Essays on Contract (1987) 81
  • Comparative / Advanced:
      - AL Corbin, 'Contracts for the Benefit of Third Persons' (1918) 27 Yale LJ 1008
      - S Williston, 'Contracts for the Benefit of a Third Person' (1902) 15 Harv LR 767
      - E McKendrick, 'Contracts for the Benefit of Third Parties: A New Proposal' (2003) 3 OUCLJ 145
      - AM Eisenberg, 'Third-Party Beneficiaries' (1992) 92 Columbia LR 1358

Capacity

Capacity Propositions
  • Propositions regarding Capacity (all, some or none may be valid):
      1. Children can enter into contracts.
      2. Intoxicated individuals can enter into contracts.
      3. Mentally ill individuals can enter into contracts.
      4. Corporations possess the same capacity as natural persons.
      5. Third-party beneficiaries hold no rights under a contract.
Capacity of Minors
Definition
  • Definition of minors: Individuals under 18 years old per the s 5 Age of Majority Act 1972 (WA).
General Rule
  • Contracts entered into by minors are generally voidable.
Exceptions (Common Law)
  • Necessaries: Valuable items required for basic living.
  • Beneficial Contracts of Service: Contracts providing substantial benefits in terms of support or education.
Minors' Contracts Binding Framework
Types of Minors' Contracts

  • Binding:
      - Contracts for necessaries (e.g., Nash v Inman).
      - Beneficial contracts of service (e.g., Roberts v Gray).

  • Binding Unless Repudiated:
      - Ongoing obligations such as leases, shares, and partnerships can be repudiated during or shortly after minority.

  • Not Binding Unless Ratified:
      - All other contracts must be ratified within a reasonable time after turning 18.

Necessaries
Definition
  • What constitutes a necessary?
      - Based on Chapple v Cooper (1844): Things necessary for reasonable existence; includes food, clothing, shelter, and educational instruction.
Onus of Proof
  • Minors can bind themselves to contracts for necessary goods and even for educational services in order to profit in the future.
Tests for Determining Necessaries
  • In Chapple v Cooper (1844), two tests are established:
      1. Law Question: Is the item in question qualified as a necessary by the definition?
      2. Fact Question: Is the item a necessary based on the specific minor's circumstance and time?
Examples of Necessaries Cases
  • Nash v Inman (1908):
      - Case involved a minor who was supplied with high-end clothing while already adequately supplied; court held they were not necessaries.
  • Scarborough v Sturzaker (1905):
      - Exchange of an old bicycle for a new one determined not to be necessaries due to insufficient supply at the contract time.
  • Roberts v Gray (1913):
      - Contract for billiards instruction assessed as necessary due to overall beneficial training provided.
  • Ryder v Wombwell (1868):
      - Purchase of expensive cufflinks by a wealthy minor not deemed necessaries without proof.
Beneficial Contracts of Service
Definition
  • Beneficial contracts deemed valuable for a minor's self-support or educational purposes are legally enforceable based on overall assessment, not clause by clause.
Case Studies
  • Roberts v Gray: Beneficial due to participation in billiards tour.
  • Hamilton v Lethbridge: Contract beneficial despite included restraints on practice.
  • De Francesco v Barnum: Contract deemed not beneficial due to oppressive terms.
Contextual Questions
  • Consideration of whether modern-day contexts (like unpaid internships) match the legal conditions of beneficial service contracts.
Voidable and Not Binding Contracts
Key Distinctions
  • Contracts like leases or partnerships obligate parties unless expressly repudiated during minority or a short time after turning 18.
  • Other residual contracts are not binding unless they are ratified after majority status.
Supply of Non-Necessaries on Credit
  • Under Hall v Wells (1962), recovering payments for non-necessaries is limited unless proof of total failure of consideration is established.
Fraudulent Misrepresentation of Age
Case Study
  • R Leslie Ltd v Sheill (1914): Legal action regarding voluntary lending based on misrepresentation of age deemed ineffective unless the specific currency lent could be recovered.
Mentally Ill and Intoxicated Persons
Capacity Test
  • Two-limb test per Imperial Loan Co v Stone (1892):
      1. Person must show inability to comprehend contract actions.
      2. Other party must have prior knowledge of such incapacity.
Key Cases
  • Blomley v Ryan (1956): Involvement during intoxicated phases raised the question of capacity, satisfying both limbs necessary for ratification.
  • Gibbons v Wright (1954): Illustrated the sliding scale of capacity responsiveness to specific transaction nature.
Corporations
Legal Framework
  • Corporations Act 2001 (Cth) s 124: Establishment of corporations as distinct legal entities with individual capacities similar to natural persons.
  • Actions should be executed through individuals namely two directors or a director and company secretary.

Privity

Who Can Enforce a Contract?
  • Defined doctrine: Only contracted parties wield enforcement rights. Third-party beneficiaries lack direct recourse to sue based on contracts not including them.
Doctrine of Privity
  • Historical context set by Tweddle v Atkinson (1861) where a groom unsuccessfully sought to enforce a contract involving his bride's father without being recognized as a party himself.
Privity Problem
Hypothetical Case Analysis
  • Scenario: Alex hires Builder Co for renovations who then sub-contracts plumbing to Pat’s Plumbing. If plumbing done inadequately, Alex's recourse against Pat's Plumbing is nonexistent based on privity doctrine.
Key Cases Involving Privity
  • Coulls v Bagot’s (1967): Established Mrs. Coulls as a joint promisee because of explicit contract terms allowing contingent royalties, unlike a third-party beneficiary.
  • Trident v McNiece (1988): Allowed direct claim for McNiece due to emergency circumstances circumventing privity restrictions, although with fragmented reasoning.
Circumventing the Privity Rule
Legal Mechanisms
  • Trust: Beneficiary rights held in trust for a non-party.
  • Agency / Himalaya Clauses: Recognizing contracting parties as acting on behalf of a third party can grant rights.
  • Estoppel: Framed through detrimental reliance principles.
  • Unjust Enrichment: Consideration taken to benefit a third party by the promisor.
Himalaya Clauses
  • Established through the case Scruttons v Midland Silicones (1962), fulfilling specific conditions outlining intent for beneficiary protection amid contractual frameworks.
Recent Cases on Privity
  • Hobart International Airport v Clarence CC (2022): Decisively changed the approach towards third-party beneficiary rights allowing declaratory accessibility, even with dissenting opinions stressing legal standing requirements.
Statutory Modifications
Key Provisions
  • Property Law Act 1969 (WA), s 11(2): Enables enforcement by expressly benefited non-parties.
  • Insurance Contracts Act 1984 (Cth), s 48: Allows insured third parties to assert claims directly, significantly simplifying claim processes reflective of situations concerning Trident.
Jurisdictional Comparison
  • Summary highlight showcasing variations in privity enforcement between jurisdictions (such as Australia, WA, and the UK) based on emerging statutory frameworks.

Conclusions

  • Three contract categories for minors identified: Binding, Binding unless repudiated, and Not binding unless ratified.
  • Mental incapacity and intoxication are analyzed through the two-limb test established in Imperial Loan v Stone.
  • Privity reflects strict enforcement adherence, but mechanisms allowing circumvention (such as statutory provisions and Himalaya clauses) are in place to elevate third-party legal rights.

Thank You

  • Curtin Law School | Semester 1, 2026