20.—(1) The Borough shall at or near a tidal work, during the whole of the construction, alteration, replacement or re-laying thereof, exhibit such lights, lay down such buoys and take such other steps for the prevention of danger to navigation as the Port Authority shall from time to time direct.
(2) After the completion of a tidal work, the Borough shall exhibit such lights, lay down such buoys and take such other steps at or near such tidal work for the prevention of danger to navigation as the Port Authority shall from time to time direct.
(3) If the Borough without reasonable excuse fails to comply in any respect with a direction given under this article it shall be guilty of an offence and liable on summary conviction to a fine not exceeding level 3 on the standard scale.