G.R. No. 162226 ; September 2, 2013
SANGGUNIANG BARANGAY OF PANGASUGAN, BAYBAY, LEYTE, PETITIONER, vs. EXPLORATION PERMIT APPLICATION (EXPA-000005-VIII) OF PHILIPPINE NATIONAL OIL COMPANY, RESPONDENT.

FACTS

The Philippine National Oil Company-Energy Development Corporation (PNOC-EDC) applied for an exploration permit covering 16,144 hectares in Leyte. The Sangguniang Barangay of Pangasugan filed a complaint with the Mines and Geosciences Bureau Panel of Arbitrators (PA), praying for the denial of the application. The Barangay argued the area was a protected watershed, and the exploration would endanger water supply and cause environmental damage. The PA dismissed the complaint for lack of jurisdiction, ruling the environmental issue was outside its purview. The Barangay appealed to the Mines Adjudication Board (MAB).
The MAB, in a Decision dated September 24, 2002, affirmed the dismissal but on a different ground. It held the PA had jurisdiction, but the Barangay’s complaint was premature. The perceived environmental damages were abstract and anticipatory, not ripe for determination, thus the Barangay lacked a cause of action. The dismissal was without prejudice to future protests if PNOC-EDC failed to comply with its Environmental Work Program. The Barangay failed to file a motion for reconsideration of this Decision within the reglementary period. Consequently, the MAB issued an Order dated January 21, 2004, declaring its September 24, 2002 Decision final and executory and giving due course to the application.

ISSUE

Whether the MAB is correct in giving due course to the exploration permit application.

RULING

Yes, the Supreme Court denied the petition and affirmed the MAB’s Order. The Court clarified that the petition assailed the MAB’s January 21, 2004 Order, which merely declared the finality of its earlier September 24, 2002 Decision due to the Barangay’s failure to timely move for reconsideration or appeal. The Court applied the doctrine of immutability of judgment, which holds that a decision that has attained finality becomes immutable and unalterable. This doctrine cannot be modified to correct even erroneous conclusions of fact or law. Its purposes are to avoid delay in the administration of justice and to put an end to judicial controversies.
The Barangay’s arguments in the petition constituted an attempt to re-litigate the merits of the MAB’s September 2002 Decision, which had long become final. The Court emphasized that the doctrine of finality is not a mere technicality but a crucial matter of public policy and procedural law designed to ensure the stability of judicial rulings. Since the Barangay allowed the MAB Decision to become final by inaction, it could no longer challenge the substantive dismissal of its complaint. Therefore, the MAB correctly gave due course to the permit application based on the final and executory status of its prior ruling.