(2) An appeal panel may, if it considers it necessary in the interests of justice to do so, direct that  evidence at an oral hearing is to be given on oath.  (3) An oral hearing is to be held in private but the panel may, if it considers that it would be in  the interests of justice to do so, direct that the hearing is to be held wholly or partly in public.  (4) The appeal panel may direct that an oral hearing is to be held, wholly or in part, via video  link, telephone conference or any other electronic means.  (5) The Board may, by notice in writing, require any person to attend a hearing convened by the  panel and to give oral evidence on oath to the appeal panel.  (6) A notice under paragraph (4) must specify one or more dates on which the person must  attend, the earliest of which must be at least 21 days after the date of the notice.  (7) A person to whom a notice under paragraph (1) is given may make a claim to the appeal  panel that—  (8) On considering a clam under paragraph (7), the panel may confirm, revoke or vary the  notice.  40.  The appellant may appear in person at an oral hearing and may be represented by any person  appointed for that purpose.  (a) the person is unable to comply with the notice, or  (b) it is not reasonable in all the circumstances to require the person to comply with the  notice.  Representation  Case management  41.  An appeals panel may—  (a) adjourn or postpone a hearing;  (b) transfer the appeal to a different appeals panel, and  (c) give whatever other directions, and may take whatever other steps, it considers necessary  for managing the appeal and securing its efficient determination.  42.  The powers under regulations 39(1) to (5) and 41 may be exercised by the chair of the panel  acting alone.  43. —(1) The Board may at any time review a determination made by the Board if the Board is  satisfied that—  (2) The Board may review a determination made under regulation 12(3)(b) or (c) where a person  entitled to victims’ payments is convicted of an offence such that regulation 6(1), (2) or (3) may  apply.  (a) the determination was made in consequence of the applicant having—  (i) provided information which the applicant knew to be false in a material particular;  (ii) recklessly provided information which was false in a material particular, or  (iii) knowingly failed to disclose a material fact;  (b) the determination was made in consequence of—  (i) ignorance of, or a mistake as to, a material fact, or  (ii) a mistake as to the law, or  (c) there has been a relevant change of circumstance.  Exercise of functions by the chair  Review  25