; and (ii) the petitioner shall provide any information requested by the Administrator, on a 1-time, periodic, or continuous basis within such timeframe as the Administrator may require, to inform a determination under subparagraph (C). (C) Determination (i) Best available science The determination of the Administrator to grant or deny a petition submitted under subparagraph (A) shall be based on— (I) the best available science; and (II) the applicable recommendations or other analysis, if any, under a report under section 101(h) (including a subsequent report). (ii) Timeline (I) In general Subject to subclause (II), the Administrator shall finalize a determination to grant or deny a petition submitted under subparagraph (A) by not later than 270 days after the date of receipt of the petition. (II) Requirement The Administrator may not finalize a determination to grant or deny a petition submitted under subparagraph (A) before the date that is 1 year after the date on which the first report under subsection (h) of section 101 is submitted after the date on which the review under subsection (c) of that section is completed. (iii) Public availability (I) In general In making a determination to grant or deny a petition submitted under subparagraph (A), the Administrator shall— (aa) make all materials submitted with the petition available for public review and comment for a period of not less than 180 days