A vessel or aircraft shall be regarded as uninfected if, although arriving from an infected port or having on board persons proceeding from an infected area, there has been no case of cholera either at the time of departure from such infected port, during the voyage, or on arrival. Such vessel or aircraft may be subjected to the measures provided under section 54(a), (g), (h) and (i). In addition the passengers and crew may be subjected to surveillance during a period which shall not exceed 5 days from the date of arrival. The crew may be prevented during the same period from leaving the ship or sanitary aerodrome except on duty of which a health officer has been notified.