Article 27 2.

A member of the Board of Appeal shall inform the Board in the event that, for one of the reasons referred to in paragraph 1 or for any other reason, he or she considers that a fellow member should not take part in any appeal proceedings. Any party to the appeal proceedings may object to the participation of a member of the Board of Appeal on any of the grounds referred to in paragraph 1, or in the case of suspected bias. Such an objection shall be inadmissible if it is based on the nationality of a member or if, while being aware of a reason for objecting, the objecting party to the appeal proceedings has taken a procedural step in the appeal proceedings other than objecting to the composition of the Board of Appeal.