A copy of any proposed rule or order to be prescribed or issued by the Secretary which imposes a prohibition under this chapter (other than under section
8374 of this title), or a petition for an exemption (or permit) under this chapter (other than under section
8374 of this title), shall be transmitted by the Secretary to the Administrator of the Environmental Protection Agency and the Secretary shall request such agency to comment thereon within the period provided to the public unless a longer period is provided under the Clean Air Act [
42 U.S.C.
7401 et seq.]. In any such case, the Administrator of the Environmental Protection Agency shall be afforded the same opportunity to comment and question as is provided other interested persons under subsection (d) of this section.