At least 2 weeks before the hearing, each party shall file with the Board a list of witnesses and documentary evidence to be introduced at the hearing, and a copy shall be served on each other party to the hearing. Prehearing Conferences. The Chairman of the Board may hold prehearing conferences as he considers appropriate. The Board may administer oaths and issue subpoenas and orders for the attendance of witnesses and the production of documents. A preliminary motion filed by a party shall be accompanied by a memorandum of points and authorities and shall be filed with the Board at least 10 working days before the hearing, and a copy shall be served on each other party to the hearing. Any response shall be filed with the Board at least 5 working days before the hearing, and a copy shall be served on each other party to the hearing. The Board may, in its discretion, grant a hearing on the motions.