The U-Shaped Line and a Categorization of the Ocean Disputes in the South China Sea

A principal aspect of the territorial and boundary delimitation disputes in the South China Sea is the so-called U-shaped line. This article addresses the genesis and substantiation of the U-shaped line claims as well as the possible change in positions of the governments of the Republic of China and the People's Republic of China with respect to the historical waters claim, which is an integral part of their U-shaped line positions. A legal analysis of the various communications of the South China Sea players with respect to the U-shaped line helps to clarify and identify the nature of four kinds of legal disputes. It is also possible to differentiate the various degrees of difficulty involved in settling each of these disputes.