The Administration's decision or order shall be stayed pending resolution by the Administration of a petition for reopening, duly filed, and for so long as such Administration's action has not been finally disposed of in accordance with the provisions of section 7 of Department of Commerce Order 117 (Revised).

Except for good cause shown, and upon leave granted, petition to reopen under § 201.174, shall be filed with the Administration within twenty (20) days after the date of service of the Administration's decision or order in the proceeding, unless a different period is fixed under § 201.54.

Upon petition and a showing of compelling cause, filed in accordance with § 201.174, or on its own motion, the Administration may at any time reopen any proceeding under the regulation in this part for rehearing, reargument, or reconsideration in whole or in part. After reasonable notice and opportunity for hearing or such other procedure as the Administration may direct, the Administration may alter, modify or set aside in whole or in part its decision therein if it finds such action is required by changed conditions in fact or law or by the public interest.

A petition for reopening for the purpose of rehearing, reargument, or reconsideration, shall be made in writing, shall state the grounds relied upon, and conform to the requirements of subpart D of this part. If the petition is for the purpose of rehearing, said petition shall state the nature and purpose of the new evidence to be adduced and that such evidence was not available at the time of the prior hearing. If the petition be for reargument or reconsideration, the matter claimed to have been erroneously decided shall be specified and the alleged errors briefly stated. In case of exceptional circumstances, satisfactorily shown by the petitioner, a request for modification of rules or orders may be made by telegram or otherwise, upon notice to all parties or attorneys of record, but such request shall be followed by a petition filed and served in accordance with subpart D of this part.

Answers to petitions to reopen shall conform to the requirements of subpart D of this part.