17. (1) Save as provided in section 18, no person except the Authority shall make, erect or fix below high water-mark within the Port any dock, pier, erection or mooring. (2) Any matter or thing made, erected or fixed in contravention of sub-section (1) may be removed by the Authority and the person who has so made, erected or fixed any such matter or thing shall be punishable with fine which may extend to ten thousand Taka and with a further fine which may extend to one thousand Taka for every day during which such matter or thing has been permitted to remain so made, erected or fixed after notice to remove the same has been given to him, and shall also be liable to pay all expenses which may have been incurred by the Authority in removing such matter or thing.