Paragraph 12 I1

If at any time after the completion of a specified work, not being a work vested in a protected asset owner, the protected asset owner gives notice to the undertaker informing it that the state of maintenance of any part of the specified work appears to be such as adversely affects the operation of a protected asset, the undertaker, on receipt of such notice and without unreasonable delay, must take such steps as may be reasonably necessary (and in accordance with the protective provisions) to put that specified work in such state of maintenance as not adversely to affect the protected asset.