Paragraph 6

If, during the construction of a tidal work or within 10 years after the completion of such work and as a consequence (whether in whole or in part) of its construction, there is caused or created an accumulation or erosion, the Council, if so requested by the Commissioners before or within the period of 10 years after such completion or exercise, shall remedy such accumulation or erosion in the manner specified in paragraph 8 and, if it refuses or fails so to do, the Commissioners may themselves cause the work to be done and may recover the reasonable cost thereof from the Council.