S.L. 424.3 Art. 11Passing from one ship to another.
PART III
If a ship is alongside any other ship, vessel or boat, and persons employed have to pass from one to the other, safe means of access shall be provided for their use, unless the conditions are such that it is possible to pass from one to the other without undue risk without the aid of any special appliance. If one of such ships, vessels, or boats is a sailing barge, flat, keel, lighter or other similar vessel of relatively low freeboard, the means of access shall be provided by the ship which has the higher freeboard.