An order described in subparagraph (A) of this paragraph shall not become effective until the date which the Administrator of the Environmental Protection Agency certifies pursuant to section 1857c–10(d)(1)(A)
1
See References in Text note below.
of title 42 is the earliest date that such plant or installation will be able to comply with the air pollution requirements which will be applicable to it. Such order shall not be effective for any period certified by the Administrator of the Environmental Protection Agency pursuant to section 1857c–10(d)(3)(B) of title 42.