13 Procedure at Hearings
1 A hearing following the giving of notice under article 6(1) or (2), article 7, article 8(1) or (2) or article 9(1) shall be conducted by the Commission or the Attorney General, as the case may be, who shall, subject as provided in this article, determine the procedure at the hearing.
2 A hearing shall be conducted in private.
3 The Commission or the Attorney General, as the case may be, may hold a single hearing following the giving of notice under article 6(1) or (2) or article 7 or, if relevant, under article 8(1) or (2) or article 9(1) in relation to all the issues arising in connection with particular funds or petroleum or petroleum products or may hold separate hearings at which specific persons or classes of person concerned with particular funds or petroleum or petroleum products may appear.
4 At a hearing a person may appear on his own behalf or be represented by an advocate or by any other person, and may give or produce oral and written evidence and may cross-examine any other person appearing at the same hearing and any witnesses produced by any such person.
5 The Commission or the Attorney General, as the case may be, may take into account any document or any other written evidence received by it or him from any person intending to appear at a hearing before a hearing is held or during the hearing provided that it or he discloses it to such other persons intending to appear at or appearing at the hearing as in its or his view have an interest in the contents thereof.
6 The Commission or the Attorney General, as the case may be, may from time to time adjourn a hearing and, if the date, time and place of the adjourned hearing are announced at the hearing before the adjournment, no further notice shall be required.