(a) General. All motions in an enforcement adjudication except those made orally, shall be in writing, state the grounds therefor with particularity, set forth the relief or order sought, and be accompanied by any affidavit, certificate, other evidence, or legal memorandum relied upon.

(b) Answer to motions. Except as otherwise specified by a particular provision of this part or by the Presiding Officer, a party shall have the right to file a written answer to the motion of another party within 10 days after the filing of such motion. The answer shall be accompanied by any affidavit, certificate, other evidence, or legal memorandum relied upon. If no answer is filed within the designated period, the party may be deemed to have waived any objection to the granting of the motion. The Presiding Officer may set a shorter or longer time for an answer, or make such other orders concerning the disposition of motions as he deems appropriate.

(c) Decision. The Presiding Officer shall rule on a motion as soon as practicable after the filing of the answer. The decision of the Presiding Officer on any motion shall not be subject to administrative appeal.