The master of a vessel, other than a small vessel lying at a recognised mooring or anchorage, must not, except where the vessel is lying aground, take any steps to render that vessel incapable of movement without first notifying the harbour master.

Subject to the exception referred to in sub-paragraph (1) the master of a vessel must at all times keep the vessel so loaded and ballasted and in such condition that it is capable of being safely moved.

Where a vessel is at any time not capable of being safely moved by means of its own propulsive machinery, the master or owner must inform the harbour master immediately and provide any further information which the harbour master may reasonably require.