Unilateral Rescission Limits in Philippine Contract Law: PNCC v. Mars Construction

In Philippine National Construction Corporation v. Mars Construction Enterprises, Inc. (G.R. No. 133909, February 15, 2000), the Supreme Court reaffirmed a fundamental principle of Philippine contract law: a party cannot unilaterally rescind a contract and must seek judicial determination first. The ruling also clarifies how courts interpret ambiguous contractual provisions and when a breach justifies refusing performance.

The Dispute

Mars Construction entered into a subcontract with CDCP (later reorganized as PNCC) in 1982 to supply approximately 70,000 cubic meters of concrete aggregates for the Philphos Project. The contract specified quantities for different aggregate types: about 17,500 cubic meters of washed sand, 17,500 of washed 3/4" gravel, 35,000 of washed 1-1/2" gravel, and an unspecified amount of sub-base.

Mars delivered late and inconsistently, prompting PNCC to source materials elsewhere. Under the contract's default clause, Mars reimbursed PNCC for the price difference—about P1.578 million. The dispute arose when PNCC refused to accept a delivery of 17,000 cubic meters of washed 1-1/2" gravel, claiming it no longer needed the material. Mars sued for lost profits, and the trial court ruled in its favor. The Court of Appeals affirmed, and PNCC appealed to the Supreme Court.

Unilateral Rescission Requires Judicial Determination

The Supreme Court denied PNCC's petition. The Court emphasized that treating a contract as cancelled or rescinded due to the other party's infractions is always provisional—contestable and subject to judicial determination. A party who rescinds without court action proceeds at its own risk.

PNCC's project director had sent a letter advising Mars of "final quantities" and stating no further deliveries would be accepted. The Court held this was an unauthorized unilateral amendment of the contract. The agreement contained no provision allowing PNCC to limit deliveries by mere advice. Judicial action is necessary for rescission to give the other party an opportunity to be heard and to determine whether rescission was proper.

Interpreting Ambiguous Contract Provisions

The Court applied Articles 1374 and 1378 of the Civil Code, which require that contractual stipulations be interpreted together and that doubts be settled in favor of the greatest reciprocity of interests. Amendment No. 2 created ambiguity because it specified quantities for three aggregate types but left the sub-base amount unspecified—if included, the total would exceed 70,000 cubic meters.

The Court interpreted the stated figures as minimum quantities that Mars was obligated to deliver. This interpretation gave both parties certainty: Mars knew exactly how much to deliver, and PNCC knew exactly how much to accept. The alternative interpretation—that the figures were mere estimates—would have left Mars uncertain of its obligations and imposed a burdensome risk on it.

When Default Justifies Refusing Performance

PNCC argued that Mars was already in default, justifying its refusal to accept delivery. The Court disagreed. The contract contained a specific remedy for default: PNCC could procure materials from other sources, and Mars would pay the price difference. PNCC exercised this option and was compensated P1.577 million.

By choosing this remedy, PNCC waived its right to rescind and was estopped from later refusing delivery on grounds of short delivery. The Court held that Mars's defaults, for which PNCC was already compensated, did not constitute a substantial breach justifying rescission.

Practical Takeaways

• Rescission is not self-executing. A party believing the other breached must generally seek judicial determination before treating the contract as rescinded. Acting unilaterally carries the risk that a court will later find the rescission improper.
• Contract provisions are read together. Courts interpret ambiguous terms in light of the entire agreement, not in isolation. Ambiguities are resolved in favor of the greatest reciprocity of interests between the parties.
• Specified quantities may be minimums. When a contract lists quantities without clear language that they are mere estimates, courts may treat them as binding minimums that the supplier must deliver and the buyer must accept.
• Choosing a contractual remedy can waive others. If a contract provides a specific remedy for breach (like price differential payments) and the injured party invokes it, that party may be barred from later rescinding for the same breach.
• Factual findings are hard to overturn. Trial court findings of fact, especially when affirmed by the Court of Appeals, are binding on the Supreme Court absent compelling exceptions.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.