A.2 Prior approvals
The prior approval referred to in paragraph A.1 is not to be refused by the appropriate authority nor are conditions to be imposed unless they are satisfied that—
(a)the development (other than the provision of or works carried out to a dam) ought to be and could reasonably be carried out elsewhere on the land; or
(b)the design or external appearance of any building, bridge, aqueduct, pier or dam would injure the amenity of the neighbourhood and is reasonably capable of modification to avoid such injury.