The Commercial Port Law Article 19

The ship owner or her agents shall fill in a prior declaration form for the ship’s entrance or departure for international commercial ports, 24 hours before the ship’s arrival, or 12 hours before the ship’s departure, and file the form with the Maritime and Port Bureau for inspection and the Commercial Port Administrative Authority to arrange berthing. However, if ships due to certain matters arrive within 12 hours after departure, entrance procedures should be handled again after the Maritime and Port Bureau have given their approval.The ship owner or her agents shall fill in a prior declaration form for the ship’s entrance or departure for domestic commercial ports, 24 hours before the ship’s arrival, or 12 hours before the ship’s departure, and file the form with the Maritime and Port Bureau or the designated agencies for inspection and to arrange berthing. However, if ships due to certain matters arrive within 12 hours after departure, entrance procedures should be handled again after the Maritime and Port Bureau or the designated agencies have given their approval.Regarding the goal and ship status of the entrance of ships actually entering the port that do not fit with the prior declaration of the entrance of ships, the owner of the ship and its representative should make amends accordingly.If the ship is likely to affect the functions and the public security of the commercial port, the Maritime and Port Bureau or the designated agencies is entitled to reject the application for her entrance into the port until such a possibility no longer exists.
中文原文 商港法第19條
船舶進入國際商港,應於到達港區二十四小時前,出港應於十二小時前,由船舶所有人或其代理人據實填具船舶入港或出港預報表,送航港局查核後,交由商港經營事業機構安排船席。
但船舶出港後十二小時以內,因故回港者,經申請航港局核准後,再補辦入港手續。
船舶進入國內商港,應於到達港區二十四小時前,出港應於十二小時前,由船舶所有人或其代理人據實填具船舶入港或出港預報表,送航港局或指定機關查核後安排船席。
但船舶出港後十二小時以內,因故回港者,經申請核准後,再補辦入港手續。
船舶實際入港目的、船況與入港預報不符者,船舶所有人或其代理人應據實辦理更正。
航港局或指定機關對於申請入港船舶,認有危及商港或公共安全之虞者,非俟其原因消失後,不准入港。

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