6.—(1) The adjudicator may require the attendance of any person (including a party to the proceedings) as a witness, at a time and place specified by him or her, at the hearing of an appeal and require the person to answer any questions or produce any document in the person’s custody or control which relate to any matter in the proceedings.
(2) Where the adjudicator makes a requirement under paragraph (1) the adjudicator must make reference to the fact that, under section 73(14) of the Act, any person who without reasonable excuse fails to comply with this requirement is liable on summary conviction to a fine, and the adjudicator must state the amount of the maximum fine current at that time.
(3) A person in respect of whom a requirement has been made under paragraph (1) may apply to the adjudicator to vary or set aside that requirement.
(4) A person is not bound to comply with the requirement under paragraph (1) unless he or she has been given at least 7 days’ notice of the hearing or, if less than 7 days, the person has informed the adjudicator that he or she accepts such notice as he or she has been given.
(5) A person other than an appellant is not bound to comply with the requirement under paragraph (1) unless the necessary expenses of his or her attendance are paid or tendered to him or her.
(6) No person is required to give any evidence or produce any document under paragraph (1) which he or she could not be required to give or produce in proceedings before a court.