Paragraph 25 I1

The undertaker shall consult with the Port Authority as to any pile, stump or other obstruction in the river which becomes exposed in consequence of the tidal works and shall forthwith remove from the river any such pile, stump or other obstruction which in the reasonable opinion of the Port Authority is a hazard to navigation or, if it is not reasonably practicable to remove it, the same shall be cut off at such level below the maximum dredged depth of the bed of the river as the Port Authority acting reasonably and without delay may from time to time approve (not being more than two metres below that depth in the main navigation channel or one metre so below elsewhere in the river).

If the undertaker fails to remove from the river any such pile, stump or other obstruction within 7 days after receipt of written notice from the Port Authority requiring the removal, the Port Authority may with all reasonable diligence and without unreasonable delay carry out the removal and recover their reasonable expenses from the undertaker.