6.—(1) CMAL may, for the purposes of maintaining the harbour and of affording access to the harbour by vessels, from time to time dredge, scour and cleanse so much of the bed, shores and channels of the sea as lie within the harbour limits and within the approaches and the channels leading to those limits and may use, appropriate or dispose of the materials (other than wreck within the meaning of section 255 of the Merchant Shipping Act 1995 (interpretation)(1)), from time to time dredged by it.
(2) No such materials shall be laid down or deposited in any place below the level of high water otherwise than in such position and under such conditions and restrictions as may be approved or prescribed by the Scottish Ministers.