In a landmark ruling on July 12, 2016, the Permanent Court of Arbitration in The Hague determined that China’s expansive territorial claim over the Spratly archipelago lacked legal foundation. The tribunal found that Beijing had infringed upon Manila’s sovereign rights by obstructing Filipino fishing operations, impeding oil exploration activities, and constructing artificial islands within the Philippines’ exclusive economic zone. The court declared China’s “nine-dash line” claim invalid, affirming that the Philippines holds exclusive rights to fishing and seabed resource extraction within 200 nautical miles of its coastline.
Judges appointed under the United Nations Convention on the Law of the Sea concluded that China had never held historic title to the waters within the dashed boundary. The ruling further established that Mischief Reef and Second Thomas Shoal are situated on the Philippine continental shelf.
Although the decision was final and binding, Beijing dismissed it as “a piece of waste paper” and proceeded with dredging operations. Foreign Secretary Teodoro Locsin Jr. addressed the UN General Assembly on September 25, 2019, stating, “The award is non-negotiable; no state, however powerful, can unilaterally overturn it.” Since the ruling, Chinese coast-guard vessels and maritime militia have regularly harassed Philippine ships. In January 2011, navy observers recorded three warning shots fired near Filipino fishing skiffs close to Jackson Atoll.
A year later, a two-month standoff began when the Philippine frigate Gregorio del Pilar attempted to detain Chinese fishermen poaching at Scarborough Shoal, prompting Beijing to deploy surveillance ships and seal off the lagoon. Water-cannon attacks were documented in 2014 at Panatag Shoal, coinciding with PLA troops blocking a Philippine supply vessel heading to the Sierra Madre garrison on Ayungin Shoal.
Manila protested again in 2017 after Chinese speedboats opened fire and chased Filipinos from Union Banks, 230 kilometers west of Palawan. Defense Secretary Delfin Lorenzana condemned the June 9, 2019, ramming of the anchored F/B Gem-Ver, calling the abandonment of 22 crew members “uncivilised and barbaric.” Vietnam’s fisheries service subsequently rescued the sailors. Satellite imagery analyzed by the Asia Maritime Transparency Initiative reveals that China has deposited over 3,200 hectares of sand and coral on seven reefs since 2014, causing environmental damage.
The tribunal agreed with Philippine scientists that dredging “caused irreparable harm to coral reefs protected under UNCLOS.” Beijing later deployed H-6K bombers and Y-8 patrol aircraft to a new 3-kilometer runway on Fiery Cross Reef, transforming biologically rich atolls into forward military bases. President Rodrigo Duterte initially set aside the ruling to pursue Chinese loans, but public outrage over the Gem-Ver sinking prompted a firmer stance.
The Department of Foreign Affairs filed 60 diplomatic protests in 2019 alone and established a new coast-guard station on Pag-asa Island, the largest Philippine-held feature in the Spratlys. Hundreds of Chinese militia trawlers returned to Whitsun Reef in March 2021, triggering daily aerial patrols and a rare joint statement from the US, Japan, and Australia supporting the 2016 award. Locsin warned that “continued defiance of the rule of law will shape the reputation of the offending state for generations.” The arbitral victory provides the Philippines with a strong legal shield, though enforcement depends on alliances.
Washington has reiterated that any armed attack on Philippine forces, coast-guard vessels, or aircraft in the South China Sea would activate mutual-defense obligations under the 1951 treaty. Manila is modernizing its navy with new frigates from South Korea and BrahMos anti-ship missiles from India, while expanding fuel exploration off Palawan in areas the court declared within Philippine jurisdiction.
Without sustained international pressure, Beijing’s grey-zone tactics—including swarming fishing fleets, laser-pointing coast-guard crews, and ramming incidents—are likely to persist. The 2016 judgment stripped China of any lawful excuse to treat the West Philippine Sea as a private lake, and every reef paved or Filipino boat harassed deepens the record of contempt for international law while stiffening resolve inside the Philippines to defend what the court has declared its own.
