South China Sea at Ten: A Bigger Coalition, a Smaller Sea

TL;DR

• Fifteen parties — the US, UK, Japan, Philippines, Australia, Canada, New Zealand, Germany, Italy, Estonia, Latvia, Lithuania, Romania, Slovenia, and the EU — issued a joint statement on 12 July marking the tenth anniversary of the Permanent Court of Arbitration's ruling against China's nine-dash line claim.
• It is the widest signatory bloc ever assembled around the award. First-time Baltic and Central European signatories signal that Europe now treats the South China Sea as a rules-of-the-road question, not a distant Asian dispute.
• The absences carry the story: Vietnam, Malaysia, Brunei, Indonesia, South Korea, India, France, and ASEAN as an institution all declined to sign. The coalition is broad in geography and narrow in the region that actually borders the water.
• Beijing's response was routine in form and pointed in substance: rejection of the ruling as "illegal, null, and void," and — six days earlier — personal sanctions on Philippine Defense Secretary Gilberto Teodoro. The message is that signatures are cheap and consequences are bilateral.
• On the water, the ruling is losing. Filipino fishermen at Scarborough Shoal report they can no longer access the traditional grounds the tribunal explicitly ruled were theirs to share. China's coast guard controls the tempo; the paper controls the framing.
• Watch the next 90 days: Philippines assumes the 2026 ASEAN chair, the EU–China 25th anniversary summit tests whether Brussels will trade South China Sea language for trade concessions, and any Batanes-adjacent escalation would put the coalition's willingness to move past statements to the test.

The briefing

What was said, and by whom

• Signatories to the joint statement (14): Australia, Canada, Estonia, Germany, Italy, Japan, Latvia, Lithuania, New Zealand, Philippines, Romania, Slovenia, United Kingdom, United States.¹
• Parallel EU statement: issued by High Representative Kaja Kallas on behalf of the Union, aligning Brussels institutionally with the joint text.²
• Core language: the tribunal's award is "a significant milestone… final, legally binding and definitive between the parties." The signatories reject China's "expansive maritime claims," including those "based on historic rights," and call for freedom of navigation and overflight, restraint in the deployment of coast guard and maritime militia, and compliance with UNCLOS.³
• Beijing's reply, within hours: the Chinese embassy in Manila said the award "will not alter the historical and factual basis for China's sovereignty over the islands of the South China Sea and their adjacent waters" and "will not weaken China's resolve and determination to safeguard its sovereignty and maritime rights and interests."⁴

Who is conspicuously absent

The signatory list is more interesting for who is not on it than who is.

The signatory bloc is, in effect, the anglosphere + G7 Europe + the eastern flank of NATO + the Philippines. That is a coherent political geography. It is not, however, the geography of the South China Sea's coastline.

The Chinese counter-narrative

Beijing did not merely reject the statement — it pre-empted it. Three moves in the six weeks preceding the anniversary:

1. Sanctions on Defense Secretary Gilberto Teodoro (early July). Travel and business ban on Teodoro and his family, triggered by his May remarks at the Shangri-La Dialogue that negotiations with the PRC are "not a path to conflict resolution but a means of gaining advantage."⁵ The measure was calibrated to land in the anniversary window.
2. The Batanes claim (2 July). Scholars at Nanjing University argued at a state-linked symposium that Batanes — the Philippine island province closest to Taiwan — is a "natural extension" of Taiwan and therefore Chinese. Manila's defence minister called the claim "baseless" and "ludicrous," but the trial balloon has now been floated.⁶
3. The GSI / MCSF pitch. Chinese-linked academic outlets are pushing the Global Security Initiative and the Maritime Community of Shared Future as the "cooperative" alternative to arbitration — framing the tribunal as a Western instrument and cooperation as the Asian one.⁷

The message is coherent: the ruling is a paper artefact of a Western order; the water is governed by presence, coast guard tonnage, and militia deployment; and any Asian state that wishes to be treated as Asian should choose Beijing's frameworks over The Hague's.

The facts on the water

The bluntest data point of the anniversary week came not from a chancery but from a Reuters dispatch out of Masinloc, on the Philippine coast opposite Scarborough Shoal:

"The Philippines may have won a landmark victory against China's claims in the South China Sea 10 years ago, but today local fishermen have become too afraid to venture out to Scarborough Shoal and its prized fishing waters for fear of harassment by Chinese vessels."⁸

The tribunal ruled explicitly that Scarborough is a shared traditional fishing ground for Filipino, Chinese and Vietnamese fishers. In 2026, of those three, only the Chinese fish there without hindrance. As Jay Batongbacal of the University of the Philippines' Institute of Maritime Affairs and Law of the Sea put it in the same dispatch, Chinese behaviour has been "counterproductive" in winning regional consent for its claims — but that has not stopped it working.

This is the gap the joint statement cannot close, and does not pretend to.

Analysis

Why the coalition grew

Three vectors converged to produce a fifteen-party statement rather than the customary four-party one.

First, the Baltic effect. Estonia, Latvia and Lithuania are not naval powers in the Pacific. Their signatures are ideological, not operational. Post-2022, the three governments have organised their foreign policy around a single proposition: that revisionist powers must be denied any precedent for redrawing borders — maritime or terrestrial — by force. Signing the SCS statement is, for Tallinn, Riga and Vilnius, the same act as arming Ukraine. It is a coherence move.

Second, the Romania–Slovenia surprise. Both are UNCLOS-active states with unresolved maritime issues of their own (Romania against Ukraine at the ICJ in 2009; Slovenia against Croatia at the PCA in 2017). Both have a doctrinal stake in the enforceability of arbitral awards. Their inclusion is Manila's diplomatic craftsmanship as much as Washington's.

Third, and most consequential, the EU institutional alignment. Kallas's parallel statement matters more than any individual member-state signature. It commits the External Action Service to a common line at a moment when the Union is negotiating its next posture toward China — the "de-risking" doctrine is congealing into something harder, and this is one of its markers.

Why it will not change the water

The joint statement is a legal-normative instrument. The dispute has moved to a domain — grey-zone maritime coercion — that norms only weakly govern. Water cannons, laser illumination, ramming, and the strategic use of militia hulls are, individually, below the threshold of anything that would trigger a Mutual Defense Treaty or a UN Security Council response. Cumulatively, they redraw the map.

The Philippines under Marcos Jr. has responded with a "transparency initiative" — embedding journalists on China Coast Guard encounters, publishing footage within hours, and forcing Beijing to bear the reputational cost of each incident. It is elegant. It has not, on the evidence of the Masinloc fishermen, restored access to Scarborough.

Signatures cannot substitute for hulls in the water. The coalition growing broader while the operational picture worsens is not a paradox; it is what happens when a normative order is defended by states that will not, individually or collectively, use force to enforce it, against a state that is willing to use everything short of force to defy it.

The sub-plots keeping this alive

• Teodoro sanctions escalation risk. Beijing has now sanctioned a sitting cabinet officer of a US treaty ally. If Manila responds symmetrically — even at token level — the precedent goes both ways.
• The Batanes trial balloon. If Chinese state media continues to seed the "Batanes belongs to Taiwan and Taiwan belongs to China" line, expect Manila to elevate its northern archipelago in the US–Philippines Enhanced Defense Cooperation Agreement site list.
• Vietnam's silence. Hanoi's non-signature is not neutrality; it is a bet. Vietnam is quietly reinforcing its own Spratly outposts and would prefer Beijing not be provoked into a symmetrical response. Any Chinese move against a Vietnamese-held feature would shatter the hedging strategy overnight.
• EU–China 25th anniversary summit. Scheduled for later in July. The Kallas statement is the opening card. Beijing will read it as a hardening of Brussels' line and price it into the summit agenda.
• ASEAN Chair 2026: the Philippines. Manila holds the chair. Expect a harder Chair's Statement at the East Asia Summit than in previous years, and a corresponding fight over the ASEAN–China Code of Conduct language.

What to watch — next 90 days

1. Reciprocal Chinese sanctions on a Baltic or Central European official, to punish signatories perceived as low-cost to Beijing.
2. A "gray-zone" incident at Second Thomas Shoal or Sabina Shoal timed to test the coalition's response cadence. Two weeks is the historical median between a Western statement and a Chinese demonstration.
3. A Vietnamese diplomatic signal — either a discreet alignment (fisheries agreement with Manila) or a hedge (senior visit to Beijing).
4. EU Foreign Affairs Council language at its next session on the Indo-Pacific: whether Kallas's line survives contact with Hungarian and, potentially, Slovakian objections.
5. US posture under a Congress increasingly focused on the Middle East. The joint statement is a State Department product. Its follow-through requires INDOPACOM attention that is currently divided.

Bottom line

The 2026 statement is the most institutionally serious defence of the 2016 award the international community has yet produced. It is also, on the evidence of Scarborough, the least operationally consequential. That gap — between what fifteen governments will sign and what one government is willing to do about — is the geopolitical fact of the anniversary. Everything else is footnotes to it.

The award is ten years old. The nine-dash line is older. The question the next decade will answer is whether norms without enforcement outlast enforcement without norms.