Vietnam and China have sparred over competing claims in the South China Sea for nearly 50 years. But for the first time, in November 2019, Vietnamese officials publicly issued threats to initiate international legal proceedings against Chinasimilar to the Philippine case that ended in 2016. Since November, there have been further indications that the Vietnamese government is quite serious, despite the limited success enjoyed by the Philippines when it invoked the law. In this post, I will address two questions on this issue: What motivates the Vietnamese government to consider this step at this time? And what can Vietnam gain?

For starters, at stake are development rights for the oil and gas reserves under Vietnams continental shelf. While the U.N. Convention on the Law of the Sea allocates resource rights in the water and under the seabed to Vietnam, out to at least 200 nautical miles from Vietnams shores, China stakes a historic rights claim to much of the same resources through its nine-dash line. This line encompasses about 80 percent of the South China Sea but has already been formally invalidated once by the arbitrators in the Philippine case. Despite its loss in court, China did not abandon its claim. Throughout 2019, Chinese government vessels harassed Vietnamese hydrocarbon survey efforts in an especially rich undersea region known as Vanguard Bank. Under the joint venture between Rosneft and Petro-Vietnam, an exploratory drilling rig began operating in the area in July 2019. China then sent its own survey vesselsunder heavy coast guard escortto demonstrate its claim. Further north, in 2011, ExxonMobil and Petro-Vietnam discovered commercially significant oil and gas deposits in Vietnams Block 118. The Ca Voi Xanh (Blue Whale) gas fieldthe area these two companies are trying to developlies only 50 miles off Vietnams coast but straddles the vast area claimed by China. A final go-ahead decision is expected sometime this year, and gaining clarity over its legal rights to resources in the region may be a key reason for Vietnam to arbitrate.

Also at stake are fishing rights in Vietnams 200-mile exclusive economic zone and in the waters off the disputed Paracel Islands. The Vietnamese government defies annual Chinese fishing bans that attempt to control and curb Vietnamese fishing activities in areas that overlap with Chinas nine-dash line. Arbitration in this region would clarify legal rights to the resources and deflect some of the domestic pressure to protect Vietnamese fishermen. Domestic resentment is a force that must be managed carefully since, in 2014, at the height of a dispute over Chinese oil rig HYSY 981, the Vietnamese people conducted anti-China riots, assaulted Chinese in Vietnam and vandalized Chinese commercial interests.

Finally, as noted above, Vietnam disputes Chinese ownership of the Paracel Islands, a group of small but strategically important features that lie between the Vietnamese coast and Chinas Hainan Island. The islands have long been claimed by Vietnam, but Chinese forces first occupied features in the Paracels in 1955 in the wake of Vietnams war for independence against France. In 1974 China fought a short sea battle against South Vietnamese forces to take full control over the last remaining Vietnamese positions. Since then, China has consolidated control over the islands, built up a military garrison, and harassed or arrested Vietnamese fishermen who try to continue fishing there.

The most likely purpose behind Vietnams threat to litigate is to gain clarity about its resource rights and to develop leverage to stop Chinese interference so that Vietnam can move forward with exploitation contracts for its offshore gas and oil deposits. But Chinese interference with resource exploitation is not a new challenge for Vietnam. Nor is the domestic political pressure over Chinese interference with Vietnamese fishing. Both issues have been managed through diplomacy in the past. What makes this time different?

Vietnams threat to litigate comes amid ongoing multilateral negotiations involving the Association of Southeast Asian Nations (ASEAN) and China over a Code of Conduct for the South China Sea. Negotiations on a Code of Conduct have been under way for two decades as an upgrade to an initial agreementthe Declaration of Conduct for Parties in the South China Seathat was seen as a stopgap measure when it was created in 2002. The parties may be close to a deal, and there is some suggestion that all sides are jockeying for position before finalizing an agreement that locks in a new status quo. To Vietnam, that status quo should provide it exclusive rights to the hydrocarbon resources under its continental shelf based on international law. This explains Vietnams strategy, which involves confronting China at sea to protect its exclusive resource rights, publicly advancing the legality of Vietnams stance and the lack of legal legitimacy for Chinas claim, while maintaining multiple avenues open for diplomacy.

China, by contrast, believes a new status quo should acknowledge its extralegal historic interests in the South China Sea, includingat a minimumjoint rights to the resources under the seabed. Further, lurking just beneath the surface is a deep sense of Chinese entitlement to deference from the smaller states of Southeast Asia. Vietnams acceptance of Chinese resource rights in the South China Sea therefore serves as a barometer of its acquiescence to Chinese predominance. This was the implicit message of Chinas foreign ministry spokesman when he said recently that China hoped Vietnam would respect Chinas sovereignty and jurisdiction over the contested waters, and not take actions that could complicate the situation.

Unfortunately, ASEAN is rarely able to apply effective multilateral pressure against China in the South China Sea. Its Southeast Asian members are united neither in political perspective regarding China nor in their core interests. The South China Sea disputes are an acute problem for ASEANs maritime states but pose little trouble for its continental members. Further, one effect of Chinas co-optation of the interests of Cambodia is that ASEANas a consensus-driven organizationfinds unity harder to achieve. Thus, there are few opportunities for Vietnam to deploy a unified Southeast Asian front against Chinese encroachment of its interests.

Chinas power play in maritime Southeast Asia is apparent in its negotiating positions on the Code of Conduct. China seeks to limit the influence of the United States and other outside powers by using the code to prohibit commercial development in the South China Sea from companies outside the region. Further, China seeks a veto over military activities in the South China Sea between the Southeast Asians and outside powers. In response, the maritime Southeast Asian states issued a series of diplomatic letters to the United Nations outlining the lack of legal basis to Chinas claims. These two approachesdiversifying international commercial relationships and seeking to build security relationships with outside powershave represented some of the strongest pressure points against China that the Southeast Asian claimant states have possessed to date.

Despite increasing engagement, security developments between the U.S. and Vietnam have progressed slowlyfor a variety of reasons. Vietnam maintains deep and long-standing energy and security ties with Russia, which is by far Vietnams largest source of weapons and military equipment. Russia is the source of one of the Vietnamese navys most advanced military capabilitiesits Kilo diesel submarines, Gepard-class frigates, and Tarantul/Molniya-class corvettes armed with supersonic SS-N-25 anti-ship cruise missilesas well as its K-300P Bastion-P coastal defense systems. On the energy front, Vietsovpetro, a joint Russian-Vietnamese energy corporation, has long been a major player in Vietnams energy industry. It is currently operating offshore in the Ca Tam (Sturgeon) oil field. The bilateral relationship was elevated from a strategic partnership to a comprehensive strategic partnership in 2012, paving the way for broader cooperation. One result of this change was a further advancement in Vietnams energy sector cooperation as they announced plans for Russias Rosatom State Atomic Energy Corporation to build a research center for nuclear science and technology in Hanoi with a 15-megawatt research reactor. Even as the Vietnam-Russia relationship advances, it is increasingly dwarfed by Chinas growing economic and security presence. Vietnam increased its military budget by nearly 400 percent in the decade between 2005 and 2014, but its capacity is far behind the military power China can bring to bear in the South China Sea. Furthermore, Russias developing entente with China causes Hanoi to question whether Russian support would be available in a potential standoff with Beijingexplaining why Vietnam is actively preparing to undertake international litigation at this time.

Although Hanoi has managed so far to keep its relationship with China stable through bilateral diplomacy, it has made no progress on earning Beijings respect for its resource interests in the South China Sea. Multilateral diplomacy through ASEAN has been a disappointment, and Vietnam cannot count on either Russia or the U.S. to be its great power patron when the chips are down. Further, even with the rapid expansion of its military budget, Vietnam knows it cannot prevail in a standoff with China. International litigation may be an increasingly attractive option to alter trends that are not currently working in Vietnams favor, especially if China provokes Vietnam with a major at-sea incident of some kind.

The military imbalance, however, is not the only barrier Vietnams leaders will need to address if they pursue a legal case against China. Vietnams domestic politics are in flux as a political transition approaches. The Vietnamese Communist Party is due to elect a new slate of leaders at its National Congress in January 2021. Additionally, the Vietnamese and Chinese communist parties maintain separate relations from the formal state-to-state diplomatic ties, giving Beijing multiple avenues of influence over the countrys decision-making. Further, as Vietnams largest trading partnerwith over $100 billion annually in two-way tradeChina has tremendous influence over the health of Vietnams economy. Vietnams manufacturing sector is especially dependent on Chinese raw materials and equipment. But this dependence may be softening. In 2018, Vietnams National Assembly ratified its countrys participation in the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) that became the successor to the Trans-Pacific Partnership when the Trump administration pulled out of negotiations. The CPTPP gives Vietnam low-barrier entry to major Pacific economies, including Japan, Canada and Australia. Vietnam also entered into a trade deal in 2019 with the European Union that eliminated 99 percent of the tariffs on goods imported by Europe. And, so far in 2020, Vietnamese manufacturing received a boost from the U.S.-China trade war. Even so, China remains Vietnams largest trading partner, giving Beijing economicas well as politicalinfluence over its neighbor to the south.

In opening the possibility of litigation, Vietnam hopes to overcome these vulnerabilities by harnessing the court of international public opinion as much as the strength of international law. The Vietnamese understand that litigation would not be the end of the matter, even if it wins. Persuading China to accept a South China Sea order based on law, rather than raw power and its own history, is a long game. If Vietnam challenges China in court, its purpose will be to increase the costs to Beijing of its intransigence. China needs stability in the South China Sea to pursue its long-term interest in developing a stable and reliable maritime component of its Belt and Road Initiative. If the Vietnamese win an international case over resource rights, China is likely to face many years of military and diplomatic pressure from the U.S., Japan, Australia, India, the United Kingdom, France and other states that have already demonstrated willingness to provide active support to the international legal order in the South China Sea. Accordingly, it is possible that the mere threat to litigate will have a favorable effect on Vietnams bilateral and multilateral negotiations with China. If not, following through with international litigation may be Vietnams best way to change unfavorable trends in the South China Sea.

The views expressed are the authors own and do not reflect the official views of the U.S. Navy or any other agency of the U.S. government.

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Vietnam Threatens China with Litigation over the South China Sea - Lawfare