Paragraph 7 I1

If, by reason of the construction of a specified work or of the failure of any specified work or of the Harbour Authority to maintain it, the efficiency of any drainage work for flood defence purposes is impaired, or that drainage work is otherwise damaged, such impairment or damage shall be made good by the Harbour Authority to the reasonable satisfaction of the Agency and if the Harbour Authority fails to do so within such reasonable period as the Agency may require by notice in writing to the Harbour Authority, the Agency may make good the same and recover from the Harbour Authority the expense reasonably incurred by it in so doing.