Paragraph 15 I1

is, during the period beginning with the commencement of the construction of that tidal work and ending with the expiration of 10 years after the date on which all the tidal works constructed under this Order are completed, wholly or partly caused by a tidal work; and

for the safety of navigation or for the protection of works in the river, should in the reasonable opinion of the PLA be removed or made good.

pay to the PLA any additional expense to which the PLA may reasonably be put in dredging the river to remove the sedimentation or in making good the scouring so far as (in either case) it is attributable to the tidal work; or

carry out the necessary dredging at its own expense and subject to the prior approval of the PLA, such prior approval not to be unreasonably withheld or delayed;