1. Oral proceedings shall be held either on the initiative of the Office itself or at the request of any of the parties to proceedings.
2. Without prejudice to paragraph 3, oral proceedings before the Office shall not be public.
3. Oral proceedings before the Board of Appeal including delivery of the decision, shall be public in so far as the Board of Appeal before which the proceedings are taking place does not decide otherwise in circumstances where serious and unwarranted disadvantages could arise from admitting the public, particularly for any of the parties to the appeal proceedings.