The harbor master may regulate and station all vessels in the harbor of Elizabeth and Elizabeth creek, and remove from time to time such vessels as are not employed in receiving and discharging their cargoes, to make room for such others as require to be immediately accommodated for such purposes. As to the fact of the vessels being bona fide employed in receiving and discharging their cargoes, the harbor master shall be the sole judge. The harbor master may determine how far and in what instances it is the duty of persons having charge of vessels to accommodate each other in their respective situations.