The Philippines has officially presented its case to a United Nations body to establish its entitlement to an extended continental shelf (ECS) west of Palawan, a strategic move to secure exclusive sovereign rights over offshore natural resources in the West Philippine Sea.
A favorable ruling by the United Nations Commission on the Limits of the Continental Shelf (CLCS) would give Manila sole authority to explore and exploit the seabed in an area that directly overlaps with Beijing’s expansive territory claims in the South China Sea.
The Philippine delegation formally delivered its partial submission at the UN Headquarters in New York following 15 years of technical research.
Initially lodged in June 2024 under Article 76 of the UN Convention on the Law of the Sea (UNCLOS), the filing allows coastal nations to extend their continental shelf limits beyond the standard 200-nautical-mile exclusive economic zone (EEZ) up to a maximum of 350 nautical miles.
The Department of Foreign Affairs (DFA) stated that the submission:
“was part of the country’s responsibility to secure a peaceful South China Sea through the rule of law in order to sustain the livelihoods of Filipinos, foster trade, protect marine biodiversity and unite coastal and littoral states.”
Led by Philippine Permanent Representative to the UN Enrique Manalo, the delegation—comprising officials from the National Mapping and Resource Information Authority (NAMRIA), DFA, Department of Justice, Office of the Solicitor General, and marine experts from the University of the Philippines—urged the UN panel to consider past UNCLOS rulings, including the landmark 2016 South China Sea Arbitral Award that invalidated China’s historical claims.
China is anticipated to formally challenge the filing. Beijing boycotted the 2013 arbitration brought by Manila, continues to reject the 2016 award, and frequently uses aggressive tactics—such as water cannon attacks and hazardous vessel maneuvers—against Philippine patrols in the area.
Deputy Assistant Secretary and Maritime Affairs spokesperson Rogelio Villanueva noted that the submission demonstrates Manila’s commitment to the UN Charter, UNCLOS, and a rules-based international maritime framework.
This marks Manila’s second submission to the UN body; in 2009, the Philippines successfully filed for the Philippine Rise, which was granted in 2012 and added 135,506 square kilometers of seabed to the nation’s jurisdiction.