6.—(1) Subject to the provisions of this Order the Trust may from time to time deepen, dredge, scour, cleanse, alter and improve the harbour for the purpose of affording uninterrupted means of access to the harbour or any part of it or the accommodation of vessels thereat.
(2) The Trust may use, appropriate or dispose of any material (other than a wreck within the meaning of Part IX of the Merchant Shipping Act 1995)(1) from time to time dredged by them from the harbour.
(3) Subject to the provisions of this Order no materials so dredged shall be laid down or deposited–
(a)in contravention of the provisions of any enactment as respects the disposal of waste; or
(b)in any place below the level of high water other than in such position and under such conditions and restrictions as may be approved or directed by the Scottish Ministers.