Beginning on September 1, China will require foreign vessels to report detailed information upon entering into the ocean areas the regime claims as its territory. An expert warns of the rising possibility of clashes in contested waters in the South China Sea. The move comes after Beijing passed a Coast Guard Law in late January, authorizing the coast guard to adopt “all necessary means, including the use of weapons” to stop threats from foreign vessels. The regime says it has a historical right to a large swath of the South China Sea, vaguely demarcated by the “9-dash line” China published on a map to indicate the area to which it laid claim. Neighboring countries do not recognize these claims. China’s maritime safety authorities said that foreign vessels should report the details of ships, estimated time of arrival and departure, current position, and other information before passing through these waters. If …