Article 22 Permanent lights on tidal worksI1

After the completion of a tidal work, the undertaker must at the outer extremity of it exhibit every night from sunset to sunrise and in periods of restricted visibility such lights, if any, and must take such steps, if any, for the prevention of danger to navigation as Trinity House or the harbour authority for the Port of Swansea or Neath within its area may from time to time direct.