Power to deviate
4. In constructing or maintaining any of the scheduled works, the Council may—
(a)deviate laterally from the lines or situations shown on the deposited plans within the limits of deviation relating to that work shown on those plans; 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.