Paragraph 7
If during the construction of a tidal work it is agreed, or in the absence of agreement it is proved to the satisfaction of an arbitrator appointed under paragraph 13, that any accumulation or erosion has been caused wholly or partly by the construction of any of the works, the undertaker, if so requested by A. B. Ports acting reasonably, shall remedy such accumulation or erosion to the extent attributable to such construction or exercise of powers in the manner specified in sub-paragraph (3).
If the undertaker refuses or fails to do so, A. B. Ports may itself cause the work to be done and may recover the reasonable cost of doing so from the undertaker.
For the purposes of sub-paragraph (1)—
in the case of an accumulation, the remedy shall be its removal; and
in the case of erosion, the remedy shall be carrying out of such reconstruction works and other protective works or measures as may be necessary.
Where an arbitrator has established that such accumulation or erosion has been caused in any event by factors other than the construction of a tidal work the undertaker shall be liable to remedy such accumulation or erosion only to the extent that the same is attributable to such construction or exercise.