(a) The Commission may, on its own motion or upon a petition, postpone, discontinue, or suspend any action taken by it under the provisions of this part. Such a petition will be served on all other parties and will not, in and of itself, stay the effective date of Commission action.

(b) The Commission shall postpone, discontinue or suspend any action provided for in its final decision if so directed by the President for reasons of national defense or foreign policy of the United States as provided in § 560.8.