After the hearing, the Secretary shall make a ruling on the petition. The ruling shall be final, subject to review as set forth in subsection (b).
The district court of the United States for any district in which a person who is a petitioner under subsection (a) resides or carries on business shall have jurisdiction to review the final ruling on the petition of the person, if a complaint for that purpose is filed not later than 20 days after the date of the entry of the final ruling by the Secretary under subsection (a)(3).
The pendency of a petition filed under subsection (a) or an action commenced under subsection (b) shall not operate as a stay of any action authorized by section 7419 of this title to be taken to enforce this subchapter, including any rule, order, or penalty in effect under this subchapter.