6.—(1) Where —
(a)a Minister has issued a direction or the tribunal or a chairman has made an order under rule 54 to exclude a claimant or his representative from all or part of the proceedings; and
(b)a chairman or the tribunal is considering whether to make, or has made, an order described in rule 10(2)(c) or (d) of Schedule 1 (requiring a person to attend and give evidence or to produce documents) or under rule 8 of Schedule 3 or rule 7 of Schedule 4;
a Minister of the Crown (whether or not he is a party to the proceedings) may make an application to the tribunal or chairman objecting to the imposition of a requirement described in rule 10(2)(c) or (d) of Schedule 1 or under Schedules 3 or 4. If such an order has been made the Minister may make an application to vary or set aside the order.
(2) The tribunal or chairman shall hear and determine the Minister’s application in private and the Minister shall be entitled to address the tribunal or chairman. The application shall be made by notice to the Secretary and the Secretary shall give notice of the application to all parties.