Upholding Sovereignty and Constitutional Mandates: The Philippine Supreme Court’s Ruling on the Tripartite Agreement for Joint Marine Seismic Undertaking in the South China Sea

Abstract

Abstract This article examines the Philippine Supreme Court’s landmark ruling declaring the Joint Marine Seismic Undertaking (jmsu) unconstitutional, emphasizing its implications for Philippine foreign policy and territorial disputes in the South China Sea. The jmsu, an agreement between China, Vietnam, and the Philippines for joint exploration in a contested maritime area, was challenged for contravening the Philippine Constitution’s provisions on national sovereignty over natural resources. The decision reaffirms the Philippines’ sovereign rights and sets a legal precedent emphasizing the primacy of the Philippine Constitution in international agreements on natural resource exploration. This article discusses the decision’s significant impact on Philippine foreign policy, the ongoing territorial and maritime disputes in the South China Sea, and its wider relevance to diplomacy and international law. The ruling marks a critical affirmation of Philippine sovereignty and adherence to legal norms, shaping the country’s future diplomatic relations and stressing the importance of constitutional fidelity in international agreements, especially within the contentious South China Sea areas.