You filthy, stinking Kraut!!!!!.........j/k!!! Anyway, here you go.......https://en.wikipedia.org/wiki/Territorial_waters
EDIT: And this...........https://en.wikipedia.org/wiki/United_Nations_Convention_on_the_Law_of_the_Sea
EDIT 2: And this......States and territories with borders on the sea (clockwise from north) include: the People's Republic of China (including Macau and Hong Kong), the Republic of China (Taiwan), the Philippines, Malaysia, Brunei, Indonesia, Singapore, and Vietnam. Sorry Russia, North and South Korea, USA and Japan.
It really depends on where you are located within the SCS and what you are doing there.