6If—
(a)by reason of the construction of any specified work it is reasonably necessary for the Port Authority to incur costs in altering, removing, resiting or reinstating existing moorings, or laying down and removing substituted moorings, or carrying out dredging operations for any such purpose, not being costs which it would have incurred for any other reason; and
(b)the Port Authority gives to the nominated undertaker not less than 28 days' notice of its intention to incur such costs, and takes into account any representations which the nominated undertaker may make in response to the notice within 14 days of the receipt of the notice;
the nominated undertaker shall pay the costs reasonably so incurred by the Port Authority.