Article 21 Provision against danger to navigationI1

In case of damage to, or destruction or decay of, a tidal work or any part of it, the undertaker must as soon as reasonably practicable notify Trinity House and the harbour authorities for the Ports of Swansea and Neath and must lay down such buoys, exhibit such lights and take such other steps for preventing 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.