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North Ocean Shipping Co Ltd v Hyundai Construction Co Ltd
This case, North Ocean Shipping Co Ltd v Hyundai Construction Co Ltd, concerns economic duress and the validity of a contract modification. Understanding this case requires grasping the interplay between consideration, duress, and affirmation.
I. The Facts:
  • Contract: North Ocean Shipping (owners) contracted with Hyundai (yard) to build a ship for US$30,950,000, payable in five installments.
  • Devaluation: The US dollar devalued by 10%, leading Hyundai to demand a 10% increase in the remaining installments.
  • No Legal Basis: There was no contractual basis for this increase.
  • Time Charterparty: The owners secretly secured a lucrative three-year charter with Shell. This created a strong incentive to complete the ship construction.
  • Hyundai's Threat: Hyundai threatened to breach the contract unless the owners agreed to the price increase.
  • Owners' Payment: Under duress, the owners agreed to the increase, stating it was "without prejudice to our rights." They paid the extra amount.
  • Delivery & Claim: The ship was delivered. The owners subsequently sought to recover the 10% overpayment.
II. The Court's Decision (Mocatta J):
The judge considered three key aspects:
A. Consideration:
  • Insufficient Consideration: The court found that Hyundai's completion of the existing contract (following Stilk v Myrick) and maintaining an amicable relationship were not sufficient consideration for the price increase. Existing contractual obligations cannot be consideration for a new agreement.
  • Sufficient Consideration: However, the court held that the increase in the letter of credit provided sufficient consideration. This alteration benefitted Hyundai (increased security).
B. Duress:
  • Economic Duress: The court determined that Hyundai's threat to breach the contract constituted economic duress. This illegitimate pressure forced the owners to agree to the increased price.
  • Voidable Contract: This meant that the contract modification (the 10% increase) was voidable due to duress. The owners had the right to rescind (cancel) the agreement.
C. Affirmation:
  • Delay: The owners waited from November 1974 (delivery) until July 1975 to make their claim.
  • Loss of Right: This delay was deemed an affirmation of the contract modification. By accepting the benefit (the completed ship) and waiting so long, they lost their right to rescind.
III. Key Legal Principles:
  • Consideration: A promise must be supported by consideration to be legally binding. Pre-existing contractual duties generally do not constitute good consideration.
  • Economic Duress: Illegitimate pressure (threats to breach contract, etc.) that forces a party into an agreement can render the contract voidable.
  • Affirmation: If a party with the right to rescind a voidable contract takes action inconsistent with rescission (e.g., accepting benefits or delaying action), they lose their right to rescind.
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