The Commercial Port Law Article 26

A master shall, immediately after entering the port, report to the Commercial Port Administrative Authority, Maritime and Port Bureau or the designated agencies his/her findings, in the present routing, of newly-formed sandbars, submerged reefs, or other new obstacles, which are likely to affect navigation safety.The Maritime and Port Bureau or the designated agencies shall announce the findings and set up warning signs for those newly-formed sandbars, submerged reefs or other obstacles, which would affect the navigation of ships, found in the commercial port area or nearby water areas.
中文原文 商港法第26條
船長於航路上發現新生沙灘、暗礁、或其他新障礙有礙航行者,應儘速或於入港時即行通報商港經營事業機構、航港局或指定機關。
在航路上發現有礙船舶航行之新生沙灘、暗礁、或其他障礙物,航港局或指定機關應隨時發布航船布告。

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