The Commercial Port Law Article 29
While navigating within a commercial port area, a ship shall not sound siren or signals unless it is necessary to comply with rules of preventing collision, or warn of an urgent situation or emergency event.
中文原文 商港法第29條
船舶在商港區域內除為遵守航行避碰規定、警告危險或其他告急時所必需者外，不得任意鳴放音響或信號。