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, at the hearing of an appeal and require him to answer any questions or produce any documents in his custody or control which relate to any matter in the proceedings.

Every document containing a requirement under paragraph (1) shall contain a reference to the fact that, under section 73(14) of the Act F1or under section 73(14) of the Act as applied by section 6(3) of the 1996 Act (as the case may be), any person who without reasonable excuse fails to comply with this requirement shall be liable on summary conviction to a fine, and the document shall state the amount of the current maximum fine.

A person in respect of whom a requirement has been made under paragraph (1) may apply to the adjudicator to vary or set aside the requirement.

A person shall not be bound to comply with a requirement under paragraph (1) unless he has been given at least 7 days' notice of the hearing or, if less than 7 days, he has informed the adjudicator that he accepts such notice as he has been given.

A person other than an appellant shall not be bound to comply with the requirement under paragraph (1) unless the necessary expenses of his attendance are paid or tendered to him.

No person shall be required to give any evidence or produce any document under paragraph (1) which he could not be required to give or produce on the trial of an action in a court of law.