Law on the Territorial Sea and the Contiguous Zone of the Republic of China Article 3

The territorial sea of the Republic of China shall be the sea area between the baseline and the outer limits measuring outwardly twelve nautical miles from the baseline.
中文原文 中華民國領海及鄰接區法第3條
中華民國領海為自基線起至其外側十二浬間之海域。

English translation for reference only; the Chinese text prevails. Not legal advice.