The methods to be employed in, and the timing of, the deposit of spoil on the landward side of the sea wall shall be in accordance with arrangements approved, at the request of the Concessionaires, by the county planning authority.

The height of the spoil deposited on the landward side of the sea wall shall not exceed the maximum specified in those arrangements.

Finishing treatment shall be applied to the surface of the spoil deposited there in accordance with those arrangements.

The county planning authority shall not refuse, or impose conditions on the grant of, any approval required for the purposes of this paragraph unless they are satisfied that it is expedient to do so on the ground that the arrangements ought to be modified to preserve the amenity of the neighbourhood or the marine environment or in the interests of nature conservation and are reasonably capable of being so modified.