231Master of vessel to comply with certain requests

231  Master of vessel to comply with certain requests  (1) The master of a vessel arriving in Australia must comply with any request by an authorised officer to:  (a) give the authorised officer a list of all persons on the vessel and prescribed particulars of each of them; or  (b) gather together those persons or such of them as are specified by the officer; or  (c) make sure of the disembarkation from the vessel of those persons or such of them as are specified by the officer.  (a) a person is on a vessel that has arrived in Australia; and  (b) that person’s name is not on a list of persons on the vessel given under subsection (1); the person is taken, for the purposes of section 230, to have been concealed on the vessel when it arrived.