- During the time that any petroleum vessel is in port, a responsible Dock Officer and Engineer Officer shall be on board to carry out and give effect to the provisions of these rules.During the time that a petroleum vessel is loading or discharging or preparing to load or discharge, petroleum, the Master or First Mate and the Chief or Second Engineer shall be on board and shall see that every precaution is taken to ensure the safety of the vessel and her cargo and in particular that the boilers and machinery are maintained in working order so that the vessel may be moved without delay if so required by the Harbour Master (Port).
