9 (3) An investigator may administer an oath to any person summoned in terms of subsection (1) and may— (a) interrogate that person concerning all matters relating to the affairs or business or property of the specified person or concerning any transaction carried out by or on behalf of the specified person; and (b) require that person to produce to the investigator any book, document or record he was required in the summons to bring with him. (4) Subject to this section, the law applicable to the privilege of a witness summoned to give evidence or to produce any book, document or record in a court of law shall apply to any person examined or required to produce any book, document or record in terms of this section. (5) No person examined or required to produce any book, document or record in terms of this section shall be entitled to refuse to answer any question or to produce the book, document or record concerned. on the ground that— (a) to answer the question or produce the book, document or record, as the case may be— (i) might or would tend to incriminate him; or (ii) would disclose a communication from the spouse of the person made during their marriage; (b) or the spouse of the person would be entitled to refuse to answer the question or to produce the book, document or record, as the case may be. (6) A banker, if required to do so in terms of this section, shall be obliged— (a) to produce any cheque, document, book or record in his possession; and (b) to answer any question; relating to any account kept at his bank by a specified person or his spouse or by any person who is or was in any way associated with or a party to any transaction with the specified person or his spouse. (7) Any person summoned in terms of this section may be assisted at the proceedings by his legal practitioner. (8) No person shall be present at proceedings in terms of this section, other than— (a) the investigator; and (b) any person giving or producing evidence; and (c) legal practitioners advising the investigator or representing the specified person concerned or any person giving or producing evidence; and (d) any other person whose presence the investigator considers to be necessary for the proper and efficient conduct of the proceedings. (9) If a person who may be summoned in terms of this section made a statement which was reduced to writing, the written statement may be read by or read over to that person after he has been sworn in terms of this section and, if he then adheres to it, it shall be deemed to be evidence given by him in terms of this section and shall form part of the record kept in terms of subsection (11).