A person aggrieved by a final order of the Commission entered pursuant to this chapter may obtain review of the order in the United States Court of Appeals for the circuit in which he resides or has his principal place of business, or for the District of Columbia Circuit, by filing in such court, within sixty days after the entry of the order, a written petition requesting that the order be modified or set aside in whole or in part.

A copy of the petition shall be transmitted forthwith by the clerk of the court to a member of the Commission or an officer designated by the Commission for that purpose. Thereupon the Commission shall file in the court the record on which the order complained of is entered, as provided in section 2112 of title 28 and the Federal Rules of Appellate Procedure.

On the filing of the petition, the court has jurisdiction, which becomes exclusive on the filing of the record, to affirm or modify and enforce or to set aside the order in whole or in part.

The findings of the Commission as to the facts, if supported by substantial evidence, are conclusive.

If either party applies to the court for leave to adduce additional evidence and shows to the satisfaction of the court that the additional evidence is material and that there was reasonable ground for failure to adduce it before the Commission, the court may remand the case to the Commission for further proceedings, in whatever manner and on whatever conditions the court considers appropriate. If the case is remanded to the Commission, it shall file in the court a supplemental record containing any new evidence, any further or modified findings, and any new order.