U.S. joining UNCLOS would have no tangible impact on Chinese policy in South China Sea
There are many reasons why ratification of UNCLOS serves U.S. interests—not least of which, the convention would allow the United States to make claims on the arctic seabed beyond its current exclusive economic zone. Perhaps most importantly, as Sen. Ben Cardin recently pointed out, ratification of UNCLOS would help the United States continue to “build a world of rules, law, and order.”
None of these benefits changes the fact that Senate ratification of the treaty will result only in a slight modification to Chinese rhetoric, and no change in Chinese policy. While Washington and most Southeast Asian nations would like to see tensions in the South China Sea resolved through application of shared rules and norms, Beijing has shown its determination to settle the matter through power politics. To be sure, the United States must continue to show that international law is the way to peacefully resolve these disputes—but the United States joining UNCLOS will not have a tangible impact on that effort.