If the Tribunal considers that a party to any proceedings on a reference has acted vexatiously, frivolously or unreasonably it may order that party to pay to another party to the proceedings the whole or part of the costs or expenses incurred by the other party in connection with the proceedings.

If, in any proceedings on a reference, the Tribunal considers that a decision of the Authority which is the subject of the reference was unreasonable it may order the Authority to pay to another party to the proceedings the whole or part of the costs or expenses incurred by the other party in connection with the proceedings.