G.R. No. L-13918; April 25, 1962
CALTEX (PHILIPPINES), INC., plaintiff-appellant, vs. KATIPUNAN LABOR UNION, defendant-appellee.

FACTS

The parties entered into a compromise agreement, approved by the Court of Industrial Relations (CIR) in 1950, settling a labor dispute. The agreement stipulated procedures the company must follow prior to dismissing an employee, including giving the union notice and an opportunity to be heard. In 1955, Caltex dismissed the union president without following these procedures. The union petitioned the CIR for his reinstatement. The CIR initially dismissed the petition, but the Supreme Court reversed, ruling the compromise agreement was a binding contract that could not be unilaterally terminated.
Subsequently, Caltex filed an action in the Court of First Instance of Manila seeking to annul the compromise agreement. Caltex alleged its consent was vitiated by a mutual mistake of law, claiming the parties intended the settlement to be a terminable “award” under Section 17 of Commonwealth Act No. 103 , not a permanent contract. The union moved to dismiss, arguing the subject matter fell under the exclusive jurisdiction of the CIR and that the Supreme Court’s prior decision upholding the agreement constituted res judicata. The lower court granted the motion to dismiss.

ISSUE

Whether the Court of First Instance correctly dismissed the complaint for annulment on the ground of lack of jurisdiction.

RULING

Yes, the dismissal was correct. The Supreme Court affirmed the lower court’s order, holding that the CIR retains exclusive jurisdiction over matters arising from the compromise agreement it approved. The legal logic is anchored on the principle of continuity of jurisdiction. The CIR, having validly approved the compromise agreement which settled the original industrial dispute, possesses the inherent authority to interpret, enforce, and even nullify that same agreement upon proper grounds raised before it. Caltex’s new theory—that the agreement is voidable due to mistake—is intrinsically connected to the enforcement and validity of the settlement of the labor dispute. It is a matter that springs from and is incidental to the main case originally within the CIR’s exclusive jurisdiction.
The Court further found no merit in the substantive claim of mistake. The alleged mistake is one of law, not fact, which is not a valid ground for annulment. Moreover, the Court’s prior decision had already interpreted the agreement’s nature and the applicable law, indicating that even if considered an “award” under the statute, it could not be terminated ex parte without notice. Thus, there was no necessity for Caltex to seek relief in an ordinary court. The proper recourse was to raise the issue of mistake within the ongoing proceedings before the CIR in Case No. 430-V(2), the very forum mandated to resolve all incidents arising from the original dispute.