10.—(1) A master shall not bring his vessel alongside a moored or anchored vessel which is displaying any flag or light required by regulation 8 without—
(a)the permission of the berth operator and the master of that vessel if it is at a berth;
(b)the permission of the harbour master and the master of that vessel if it is elsewhere, and
shall otherwise keep his vessel at a safe distance from that vessel.
(2) The permission, referred to in paragraph (1), of the berth operator and of the harbour master may relate to a named vessel, to a class of vessels or to vessels generally.