(a) Except for oral motions made in proceedings on the record, or where the administrative law judge otherwise directs, each motion shall-(2) Contain a concise statement of supporting grounds.(b) Unless the administrative law judge or the Board orders otherwise, any party to a proceeding in which a motion is filed under paragraph (a) of this section shall have 15 days from service of the motion to file a statement in response.(c) Failure to make a timely motion or to file a statement in response may be construed as a waiver of objection.(d) An administrative law judge or the Board shall rule on all motions as expeditiously as possible.