(1)Subject to the provisions of this Act, the Authority may from time to time deepen, dredge, scour and improve the bed and foreshore of the waters of the port and blast any rock in the port.
(2)Any material taken up or collected in the course of such operations shall be the property of the Authority and may be used, sold, removed, deposited or otherwise disposed of as the Authority may think fit :
Provided that no such material shall be laid down or deposited in any place below the level of high water, except in such position as the Secretary of State may approve and subject to such conditions or restrictions as he may impose.
(3)(a) In the exercise of the powers conferred by this section the Authority shall not interfere with, damage or injuriously affect any electricity work, gas work or sewerage work without the consent of the electricity undertakers, the gas undertakers or the sewerage board, as the case may be.
(b)Before operations for deepening, dredging, scouring or improving the bed and foreshore of the port or blasting any rock are carried out under the powers of this section within 150 yards of any subaqueous cable belonging to or used by the Post Office, electricity work, gas work or sewerage work where blasting operations are involved, or in any other case within 50 yards of any such cable, electricity work, gas work or sewerage work, the Authority shall give in writing to the Post Office, the electricity undertakers, the gas undertakers or the sewerage board, as the case may be, not less than twenty-eight days' notice of their intention so to do.
(c)No materials taken up or collected shall be laid down or deposited in such a place or manner as to cover any such subaqueous cable, electricity work, gas work or sewerage work or in any way obstruct or impede any work of or connected with the inspection, maintenance, removal, renewal or repair of such a cable, electricity work, gas work or sewerage work without the written consent of the Post Office, the electricity undertakers, the gas undertakers or the sewerage board, as the case may be.