Subject to the provisions of the said Act and to the Governor-General’s previous approval of a plan of the works proposed, the Board may borrow moneys, not exceeding in the whole two hundred and fifty thousand pounds, for expenditure on harbour-works within the area under the Board’s control; and, in particular, for the construction and completion of all works directed towards the improvement of navigation, the protection and conservation of river-banks, the erection of buildings and structures for promoting and facilitating maritime trade and commerce, and to ensure the safety and accommodation of shipping, and to provide increased facilities for maritime trade; and for the employment of experts and the obtaining of information and surveys as to the desirability or practicability of any works contemplated; and for the reclamation of land. All such works shall be deemed to be harbour-works within the meaning of the said Act.”