Motions and petitions shall state the relief sought, the basis for relief and the authority relied upon. If made before or after the hearing itself, these matters shall be in writing. If made at the hearing, they may be stated orally; but the administrative law judge may require that they be reduced to writing and filed and served on all parties. Within 8 days after a written motion or petition is served, any party may file a response to a motion or petition. An immediate oral response may be made to an oral motion. Oral argument on motions will be at the discretion of the administrative law judge.