Power to deviate
4.—(1) In constructing or maintaining any of the scheduled works, the Council may—
(a)deviate laterally from the lines or situations shown on the works plan within the limits of deviation relating to that work shown on that plan; and
(b)deviate vertically from the levels shown on the deposited sections—
(i)to any extent not exceeding 3 metres upwards; and
(ii)to any extent downwards as may be necessary or expedient.
(2) Without prejudice to the generality of paragraph (1), in constructing and maintaining Work No.1B the Council may, to the extent it thinks fit, deviate from the design of the bridge structure shown on the sections, including by varying the height or clearance above the level of the water underneath it.