A motion for postponement or continuance shall be in writing, shall be filed in accordance with §17.3 of this title (relating to Filing of Documents), and shall be served on all parties of record prior to the hearing date. The motion shall set forth the specific grounds upon which it is sought. Protest to such motion and to the examiner's ruling shall be made as provided in §17.12 of this title (relating to Pleadings). Within 10 days prior to a hearing, or during a hearing, a postponement may be granted by an examiner only if good cause is shown upon either oral (by conference call if a hearing is not in progress) or written motion.