Section 12. And be it further enacted by the authority aforesaid, That it shall be the duty of the quarantine master, immediately after the arrival and examination as aforesaid, of any ship or vessel liable to be detained at the Lazaretto for purification as aforesaid, to direct and cause such ship or vessel to be properly moored near the Lazaretto, at such distance from any other vessel or vessels under quarantine, as may prevent the communication of any infectious disease to or from the same. And the cargo, bedding and clothing, or any part thereof contained in such ship or vessel, to be landed, cleansed and purified, under the direction of the Lazaretto physician; and it shall be the particular duty of the said quarantine master, to prevent any personal intercourse between the persons on board different vessels under quarantine, and for that purpose to take possession of, and secure the boats of such vessels from sunset to sunrise of the succeeding day, until their respective terms of quarantine shall be completed; to preserve and enforce order and obedience to this act, and all such orders and regulations as the board of health shall from time to time ordain for the government and management of the Lazaretto, and the persons, vessels and cargoes under quarantine.