The Hague just threw out Beijing's '9-dash line' in the South China Sea ruling
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(China's "nine-dash line."CSIS/David Choi/Business Insider)

In a highly anticipated ruling, a Hague-based international tribunal found that Beijing's so-called nine-dash line of its territorial claims in the South China Sea had no legal basis.

The tribunal also ruled on Tuesday that Beijing had violated international law by "causing severe harm to the coral reef environment."

The Permanent Court of Arbitration issued a 500-page unanimous ruling in Republic of Philippines v. People's Republic of China, a case brought by the Philippines in 2013.

Manila's 15-point case critically asked the tribunal to rule on the status of China's nine-dash line, a boundary that is the basis for its 69-year-old claim to roughly 85% of the South China Sea.

Territorial claims from Vietnam, Malaysia, Indonesia, Brunei, the Philippines, Taiwan, and China make the South China Sea one of the most disputed places on the planet.

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(Reuters/Amanda Macias/Business Insider)

China, which claims the lion's share of the region, has boycotted prior hearings. Foreign Ministry spokesman Lu Kang told reporters ahead of the ruling, "We won't accept any" of the court's "so-called materials, no matter what they are."

"No matter what kind of ruling is to be made, Chinese armed forces will firmly safeguard national sovereignty, security, and maritime interests and rights, firmly uphold regional peace and stability, and deal with all kinds of threats and challenges," China's Defense Ministry said in a statement.

Even if Beijing continues to ignore the decision, the ruling is significant. It is the first time a legal challenge has been brought in the dispute, which covers some of the world's most promising oil and gas fields and vital fishing grounds.

'A complete and total victory for the Philippines'

Dredgers deposit sand on the northern rim of the Mischief Reef, located 216 km (135 miles) west of the Philippine island of Palawan, in this Center for Strategic and International Studies (CSIS) Asia Maritime Transparency Initiative satellite image taken on February 1, 2015 and released to Reuters on April 9, 2015.  REUTERS/CSIS's Asia Maritime Transparency Initiative/Digital Globe/Handout
Dredgers deposit sand on the northern rim of the Mischief Reef, located 216 km (135 miles) west of the Philippine island of Palawan, in this Center for Strategic and International Studies (CSIS) Asia Maritime Transparency Initiative satellite image taken on February 1, 2015 and released to Reuters on April 9, 2015. REUTERS/CSIS's Asia Maritime Transparency Initiative/Digital Globe/Handout

(Satellite image of dredgers depositing sand on the northern rim of the Mischief Reef.Thomson Reuters)
Tuesday's ruling reflects the shifting balance of power in the 3.5-million-square-kilometer sea, where China has been expanding its presence by building artificial islands and dispatching patrol boats that keep Philippine fishing vessels away.

"The award is a complete and total victory for the Philippines," Paul Reichler, the lead counsel for Manila in its arbitration case against Beijing's South China Sea claims, said in a statement. "On every significant issue in the case the Philippines prevailed."

"This award represents a devastating legal blow to China's jurisdictional claims in the South China Sea," Ian Storey of Singapore's ISEAS Yusof Ishak Institute, told Reuters.