Paragraph 64 I1

After the purpose of any temporary tidal work in or that may affect the HST approach channel has been accomplished and after a reasonable period of notice in writing from C.RO requiring it do so, the undertaker, without unnecessary delay, must remove that work or any materials relating to it which may have been placed below the level of high water by or on behalf of the undertaker and, on its failing to do so within a reasonable period after receiving such notice, C.RO may remove the same and charge the undertaker with the reasonable expense of doing so, which expense the undertaker must repay to C.RO.