Paragraph 138 InterpretationI1

If by reason of the construction of the authorised development or any specified work or of the failure of any such work the efficiency of any drainage work for flood defence purposes is impaired, or the drainage work is otherwise damaged, the impairment or damage must be made good by the undertaker to the reasonable satisfaction of the Board and, if the undertaker fails to do so, the Board may make good the impairment or damage and recover from the undertaker the expense reasonably incurred by it in doing so.