Classification and attainment dates

TABLE 3 1 Area classification Design value Primary standard attainment date Moderate 9.1–16.4 ppm December 31, 1995 Serious 16.5 and above December 31, 2000 Upon application by any State, the Administrator may extend for 1 additional year (hereinafter in this subpart referred to as the “Extension Year”) the date specified in table 1 of subsection (a) if— Any area that is designated attainment or unclassifiable for carbon monoxide under section 7407(d)(4) of this title, and that is subsequently redesignated to nonattainment for carbon monoxide under section 7407(d)(3) of this title, shall, at the time of the redesignation, be classified by operation of law in accordance with table 1 under subsections (a)(1) and (a)(4). Upon its classification, the area shall be subject to the same requirements under section 7410 of this title, subpart 1 of this part, and this subpart that would have applied had the area been so classified at the time of the notice under subsection (a)(2), except that any absolute, fixed date applicable in connection with any such requirement is extended by operation of law by a period equal to the length of time between November 15, 1990, and the date the area is classified. Within 6 months following the applicable attainment date for a carbon monoxide nonattainment area, the Administrator shall determine, based on the area’s design value as of the attainment date, whether the area has attained the standard by that date. Any Moderate Area that the Administrator finds has not attained the standard by that date shall be reclassified by operation of law in accordance with table 1 of subsection (a)(1) as a Serious Area. The Administrator shall publish a notice in the Federal Register, no later than 6 months following the attainment date, identifying each area that the Administrator has determined, under subparagraph (A), as having failed to attain and identifying the reclassification, if any, described under subparagraph (A). Any reference in this subpart to a “Moderate Area” or a “Serious Area” shall be considered a reference to a Moderate Area or a Serious Area, respectively, as classified under this section.