Shipping Act Article 4

Unless a franchise is granted, a non-ROC vessel may not transport passengers or cargoes between Republic of China (ROC) ports.
中文原文 航業法第4條
非中華民國船舶,不得在中華民國各港口間運送客貨。
但經主管機關特許者,不在此限。

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