The Authority may fill up, raise and reclaim creeks, inlets, bends, mud flats, sands and sloblands in and adjoining the port, and for that purpose may place piles in the port and construct groynes, retaining walls and other works in or upon the bed and danks of the port notwithstanding interference with public rights of navigation and other public rights:
Provided that the Authority shall not exercise the powers of this section—
(a)in relation to any land not owned by them unless they first obtain the consent in writing of the owner thereof; or
(b)in relation to any part of the port in front of or adjoining land belonging to Her Majesty in right of the Crown or to a government department or held in trust for Her Majesty for the purposes of a government department and protected by section 86 (Crown rights) of this Act without the consent in writing of the Crown Estate Commissioners or the government department, as the case may be.