(A) Except for oral motions made upon the record at hearing, a motion shall be in writing and shall state with particularity the grounds upon which it is based.
(B) Unless otherwise directed by the commission, a party must file written motions at least ten days in advance of hearing. The ten day deadline for filing a motion may be waived or shortened, if the movant demonstrates that unusual circumstances exist justifying an exception to this rule.
(C) Unless otherwise directed by the commission, any party to a proceeding shall have ten days from service of a motion, or until hearing, whichever is earlier, to file a response to said motion.
(D) The commission may grant a motion for the admission of additional evidence when satisfied that such additional evidence is newly discovered and could not with reasonable diligence have been ascertained prior to the proceeding before the commission.
(E) In any matter or cause pending before the commission, the commission may request that briefs be furnished by the parties to the appeal, within a time limited by the commission, but not less than ten days after request thereof. Responsive briefs may be filed as determined by, and within a time limited by, the commission.
(F) Upon motion made and with leave of the commission, amicus curiae briefs may be filed.
(G) Any application for an extension of time will be denied unless there is incorporated therein a good and sufficient reason for any such extension.
(H) Briefs which are filed shall be legible and shall conform in all other appropriate respects to the requirements of rule 1509-1-11 of the Administrative Code.