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section  107 (designating  carbon monoxide  nonattainment  areas), the

Administrator shall publish a  notice announcing the classification of

each  such  carbon  monoxide  nonattainment area.  The  provisions  of

section  172(a)(1)(B)  (relating  to  lack  of  notice-and-comment and

judicial review) shall apply with respect to such classification.

   "(3)  If an  area classified under  paragraph (1),  table 1, would

have  been classified in another  category if the  design value in the

area were 5 percent greater or 5 percent less  than the level on which

such  classification   was  based,  the  Administrator   may,  in  the

Administrator's  discretion,  within 90  days  after the  date  of the

enactment of  the Clean Air  Act Amendments of  1990 by  the procedure

required under paragraph (2), adjust  the classification of the  area.

In making  such adjustment, the Administrator may  consider the number

of exceedances  of the national  primary ambient air  quality standard

for carbon monoxide in the area, the level of pollution

transport between  the area and the other  affected areas, and the mix

of  sources and air pollutants in the area. The Administrator may make

the same adjustment  for purposes of paragraphs (2), (3), (6), and (7)

of section 187(a).

   "(4) 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-

      "(A)  the   State  has  complied  with   all  requirements  and

   commitments   pertaining   to   the   area   in   the   applicable

   implementation plan, and

      "(B)  no more than one  exceedance of the  national ambient air

   quality standard level  for carbon  monoxide has  occurred in  the

   area in the year preceding the Extension Year.

No more than  2 one-year extensions may be issued under this paragraph

for a single nonattainment area.

   "(b) New Designations and Reclassifications.-

      "(1)  New  designations  to  nonattainment.-Any  area  that  is

   designated attainment or unclassifiable for carbon  monoxide under

   section  107(d)(4),  and  that  is  subsequently  redesignated  to

   nonattainment for carbon monoxide under section 107(d)(3),  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 110,  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  the  date  of the

   enactment  of the Clean  Air Act Amendments  of 1990  and the date

   the area is classified.

   "(2) Reclassification of moderate areas upon failure to attain.-

      "(A)  General rule.-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.

      "(B)  Publication of notice.-The  Administrator shall publish a

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