A party may apply for a protective order to close part of a hearing. The party making the request should state the justification for the application to the presiding officer. If the other party opposes the request, that party may provide a written response to the presiding officer within 10 days of the request. The presiding officer shall determine which, if any, parts of the proceeding shall be closed, and state the reasons therefore, in writing, within 20 days of receiving the request.