5(1)If any pile, stump or other object becomes exposed in the course of constructing any specified work (other than a pile, stump or other object on the site of any permanent work), such that it has or is likely to have any adverse effect on navigation in, or flow or regime of, the river, the nominated undertaker shall notify the Port Authority and as soon as reasonably practicable after the receipt of notice in writing from the Port Authority requiring such action, remove it from the river or, if it is not reasonably practicable to remove it, cut it off at such level below the bed of the river as the Port Authority may reasonably direct.U.K.
(2)If the nominated undertaker fails to remove from the river or cut off any such pile, stump or other object within 28 days after receipt of written notice from the Port Authority requiring the removal or cutting off, the Port Authority may carry out the removal or cutting off and recover their costs from the nominated undertaker.