Territorial Disputes and Preliminary Injunctions: When a Writ Is Not Functus Officio

In a territorial dispute between local governments, a preliminary injunction can be a powerful tool — and a contested one. When one party later amends its pleadings, can the other side argue that the injunction has become functus officio, or spent, and should be lifted? In City of Makati v. Judge Ygaña (G.R. No. 168781, September 14, 2007), the Supreme Court En Banc answered no, clarifying the limits of the functus officio doctrine and the binding effect of a final appellate ruling.

The Dispute Between Makati and Taguig

The case arose from a long-running boundary conflict over portions of Fort Bonifacio, particularly the "Inner Fort" or military camp proper. In 1993, Taguig sued Makati before the Regional Trial Court of Pasig City, seeking to confirm its territorial boundaries and to declare certain presidential proclamations unconstitutional. Taguig also asked for a preliminary injunction to stop Makati from exercising jurisdiction over disputed areas, including the Inner Fort.

The trial court granted the injunction. Makati challenged it before the Court of Appeals. In a 1995 decision, the appellate court initially nullified the writ entirely. But on reconsideration, the CA reinstated the injunction — but only over the Inner Fort — noting that Makati had admitted in its answer that it had never exercised jurisdiction over that area.

That appellate resolution became final and executory in 1997.

The Amended Answer and the Motion to Declare the Writ Functus Officio

Years later, in 2002, Makati filed a motion to confirm that the preliminary injunction had become functus officio, or alternatively, to dissolve it. Makati argued that its original admission of non-exercise of jurisdiction had been "obliterated" when the CA later allowed it to file an amended answer. In that amended answer, Makati claimed it actually exercised jurisdiction over certain barangays inside the Inner Fort.

The trial court denied the motion, and the CA affirmed. Makati then went to the Supreme Court.

The Ruling: No Change of Facts, Only a Change of Allegations

The Supreme Court denied Makati's petition. The Court held that the amendment of Makati's answer did not affect the reinstated preliminary injunction over the Inner Fort.

The Court emphasized that the issues resolved in the earlier appellate rulings were entirely different. The first ruling (the Jacinto Resolution) settled the propriety of the preliminary injunction. The later ruling (the Dacudao Decision) merely allowed the amendment of the answer to give the trial court a full picture of the controversy. It did not invalidate the earlier final judgment.

The Court also rejected Makati's argument that the "facts" had changed. What changed were only the allegations in the answer — not the actual facts on which the injunction was based. As the Court put it, "a mere change or amendment in the allegations of an Answer is not the change of facts contemplated under the law-of-the-case doctrine."

The Law-of-the-Case Doctrine and Finality of Judgments

The Court applied the doctrine of law of the case. Under this doctrine, once an appellate court has settled a question and remands the case, that ruling becomes the controlling legal rule between the same parties in the same case. It continues to bind the parties so long as the facts on which it was predicated remain the same.

Here, the Jacinto Resolution had long become final. The Court stressed that "the basis of a decision cannot be erased by the simple expedient of amending one's pleading, especially when the judgment has already attained finality." Public policy, judicial orderliness, and economy require stability in final judgments.

The Court further noted that the injunction was not based solely on Makati's admissions. It was also supported by documentary evidence and witness testimony presented by Taguig. The admissions merely confirmed that the injunction would preserve, not subvert, the status quo.

Practical Takeaways

• Final rulings bind the parties. Once an appellate ruling on an interlocutory matter becomes final, it is the law of the case. A later amendment of pleadings cannot undo it.
• Amending an answer is not a change of facts. The functus officio doctrine applies when the basis of the writ has truly ceased or been extinguished — not when a party merely changes its allegations.
• Preliminary injunctions preserve the status quo. A writ may be reinstated or limited based on the actual state of possession or jurisdiction, not on what a party later claims.
• To dissolve an injunction, follow the rules. Under Section 6, Rule 58 of the Rules of Court, a motion to dissolve a preliminary injunction must be supported by affidavits of the party enjoined. Failure to comply is fatal.
• Boundary disputes are resolved on the merits. Incidental rulings, such as on injunctions, do not decide the main case. The underlying territorial claims must still be tried and determined.

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