Philippines Files UN Chart, China Rejects Claims

The Philippines has opened a new legal and diplomatic front in its long-running dispute with China by formally submitting a nautical chart of Scarborough Shoal, known as Bajo de Masinloc, to the United Nations.

Located approximately 120 nautical miles west of Luzon, the shoal is a vital fishing ground where China has maintained a significant presence since a 2012 standoff with the Philippines.

On July 29, 2026, Philippine Ambassador Enrique A. Manalo deposited Chart 1567 with the United Nations, a move based on Article 16, paragraph 2 of the UN Convention on the Law of the Sea (UNCLOS).

The filing establishes normal baselines, a 12-nautical-mile territorial sea, and a 24-nautical-mile contiguous zone around the shoal, serving to document the Philippines' maritime position without constituting a UN ruling on territorial sovereignty.

China did not participate in the arbitration and has consistently rejected both the proceedings and the 2016 award.

The tribunal found that China had unlawfully prevented Filipino fishermen from accessing their traditional fishing grounds, a ruling China consistently rejected while also refusing to participate in the proceedings and remains opposed to the current legal filing.

China's Foreign Ministry declared the Philippine action illegal and void on July 31, 2026, just two days after the chart was filed.

The PLA Southern Theater Command responded directly by conducting naval and air exercises in August, which Spokesperson Chen Xi described as a 'serious warning' against Philippine provocations.

Rear Admiral Roy Vincent Trinidad from the Philippines stated that such military displays do not alter the legal status of the maritime features or the Philippines' maritime claims under international law.

Formal UN filings coexist with frequent water cannon use and dangerous maneuvers, defining a conflict that plays out both in courtrooms and through physical naval confrontations.

Incidents include the use of water cannons and dangerous maneuvers between coast guard vessels, as the Philippines emphasizes international law and China relies on its unilateral sovereignty claims.

In late May 2026, Philippine authorities identified a floating platform within the Scarborough Shoal Lagoon, which was subsequently removed by June 17th after Manila filed a diplomatic protest.

China claimed the structure was for scientific research, while the Philippines argued it required consent, and further tensions arose in August and September when the Chinese research vessel 'Haiyang Dizhi 10' was monitored for two weeks near Bajo de Masinloc, though no actual seabed drilling activity was confirmed by the Philippine Coast Guard.

Despite Manila's ongoing legal filings, a physical presence of 35 Chinese naval and coast guard vessels persists across four monitored features between September 15th and 21st. Figures identifying 10 coast guard and 6 PLA Navy ships near Bajo de Masinloc underscore why legal filings alone have not transformed conditions at sea.

These figures demonstrate that legal filings alone have not altered conditions at sea, as China continues to maintain a substantial physical presence in the disputed waters, despite Manila's ongoing efforts to strengthen its documentary position through international law.

As the Philippines serves as chair in 2026, it is leading regional negotiations with China on a Code of Conduct, with Secretary of Foreign Affairs Maria Theresa P. Lazaro expressing hope for a conclusion by the end of the year.

Key issues such as the agreement's scope, legal character, and rules on self-restraint remain under negotiation, reflecting ongoing diplomatic efforts despite persistent maritime confrontations.

Manila's deposition of Chart No. 1567 at the UN aims to formalize its maritime limits and legal position, while Beijing steadfastly rejects the filing, maintaining its own sovereignty claims over the area.

The 2016 arbitral award, which is a central pillar of Manila's legal arguments, continues to be rejected by China, creating an impasse.

Beyond maps and diplomatic statements, this dispute profoundly impacts the livelihoods of local fishermen, as their access to fishing grounds and ability to operate safely are directly determined by the contested control of these waters.