The U.S. State Department has issued its most comprehensive study yet on Chinaâ€™s sweeping maritime claims in the South China Sea and concludes that they amount to an unlawful claim to most of the disputed waterway and â€œgravely undermine the rule of law.â€
The 47-page â€˜Limits in the Seasâ€™ report, released on Wednesday, also states that Chinaâ€™s claim to â€œhistoric rightsâ€ over the South China Sea is unlawful â€“ a finding that concurs with the decision of the 2016 international arbitration tribunal in a case brought by the Philippines.
China, which has ignored the tribunal, has been engaged in territorial disputes with five other claimants in the South China Sea. The Chinese claims are by far the largest, covering up to 90 percent of the sea.
â€œThese claims, especially considering their expansive geographic and substantive scope, gravely undermine the rule of law in the oceans and numerous universally recognized provisions of international law reflected in the Convention (on the Law of the Sea or UNCLOS),â€ the State Department report says.
In the report, the U.S. reiterates its call for the Peopleâ€™s Republic of China (PRC) to conform its maritime claims to international law and to comply with the decision of the tribunal, as well as â€œto cease its unlawful and coercive activities in the South China Sea.â€
China has yet to respond to the report, but in the past Beijing has insisted that it holds â€œhistorical rightsâ€ to most of the South China Sea and declared the arbitration tribunalâ€™s ruling â€œnull and void.â€ It also pointed out that the U.S. is not a signatory of UNCLOS which China ratified in 1996.
The U.S. report, which examines four categories of maritime claims made by China, is one of a series issued by the State Departmentâ€™s Office of Ocean and Polar Affairs, Bureau of Oceans and International Environmental and Scientific Affairs on maritime claims by different countries.
â€œItâ€™s really well-argued, based on the latest information from Chinese sources,â€ said Bill Hayton, a well-known South China Sea scholar.
â€œIt doesnâ€™t change the U.S. position in any way but it gives everyone who follows developments in the South China Sea a really good set of data points on which to base their discussions,â€ he added.
The U.S. position has always been that it doesnâ€™t take side in the dispute about which country has sovereignty over the islands in the South China Sea.
The new study â€œexamines only the maritime claims asserted by the PRC and does not examine the merits of sovereignty claims to islands in the South China Sea asserted by the PRC or other States.â€
However, the findings show that “the overall effect of these maritime claims is that the PRC unlawfully claims sovereignty or some form of exclusive jurisdiction over most of the South China Sea.â€
In recent years, China has been developing artificial islands and stepping up military presence to reinforce its sovereignty claims despite concerns and protests from neighboring countries.
The new report builds on a previous U.S. analysis of Chinaâ€™s so-called â€œnine-dash lineâ€ that encircles most of the South China Sea and serves as the basis for the claim to â€œhistorical rightsâ€ in the sea.
â€œThe idea of ‘historic rights’ in the South China Sea was invented by Professor Kuen-Chen Fu and other nationalist ‘New Party’ politicians in Taiwan in the late 1980s and 1990s,â€ explained Hayton, adding that it was then incorporated into Chinaâ€™s legal framework.
China also claimed that its nine-dash line is a successor to the U-shaped line map issued by the Republic of China government, based in Taiwan, in 1947.
But Taiwan, despite being a claimant, â€œdoes not recognize the nine-dash line used by China to claim â€˜historical rightsâ€™ in the South China Sea,â€ said Chung-Ting Huang, a research fellow at the Taiwanese Institute for National Defense and Security Research.
â€œTaiwan and China are not on the same page about the definition of the nine-dash line,â€ Huang said.
Noting that China has not provided any additional information about the substantive content of this historical rights claim, the â€œLimits in the Seasâ€ report said the claim is inconsistent with international law and â€œthe international community, including littoral states of the South China Sea, has made clear that it rejects the PRCâ€™s â€˜historic rightsâ€™ claim.â€
Other maritime claims
Besides â€œhistoric rights,â€ three other categories of claims examined in the State Departmentâ€™s report are sovereignty claims over maritime features; straight baselines; and maritime zones.
Baselines are demarcation lines connecting the outermost points of the features of archipelago that are meant to circumscribe the territory that belongs to it.
China claims sovereignty over more than 100 features in the South China Sea that are submerged by water during high tide.
Beijing has been drawing straight baselines around four groups of scattered islands in order to claim ownership of everything within those baselines.
Analyzing each of those claims using UNCLOS, the report said that Chinaâ€™s â€œexpansive maritime claims are plainly inconsistent with international law.â€
â€œThe United States and numerous other states have rejected these claims in favor of the rules-based international maritime order within the South China Sea and worldwide,â€ it concluded.