104 STAT. 2452 PUBLIC LAW 101-549—NOV. 15, 1990 42 USC 7511f. Reports. Public information. 42 USC 7512. shall, by June 30, 1992, designate the area as nonattainment under section 107(d)(4). "SEC. 185B. NO, AND VOC STUDY. "The Administrator, in conjunction with the National Academy of Sciences, shall conduct a study on the role of ozone precursors in tropospheric ozone formation and control. The study shall examine the roles of NOj and VOC emission reductions, the extent to which NOx reductions may contribute (or be counterproductive) to achievement of attainment in different nonattainment areas, the sensitivity of ozone to the control of NO,, the availability and extent of controls for NOx, the role of biogenic VOC emissions, and the basic information required for air quality models. The study shall be completed and a proposed report made public for 30 days comment within 1 year of the date of the enactment of the Clean Air Act Amendments of 1990, and a final report shall be submitted to Congress within 15 months after such date of enactment. The Administrator shall utilize all available information and studies, as well as develop additional information, in conducting the study required by this section.". SEC. 104. ADDITIONAL PROVISIONS FOR CARBON MONOXIDE NON- ATTAINMENT AREAS. Part D of title I of the Clean Air Act is amended by adding the following new subpart at the end: "Subpart 3—Additional Provisions for Carbon Monoxide Nonattainment Areas "Sec. 186. Classifications and attainment dates. "Sec. 187. Plan submissions and requirements. "SEC. 186. CLASSIFICATION AND ATTAINMENT DATES. " (a) CLASSIFICATION BY OPERATION OF LAW AND ATTAINMENT DATES FOR NONATTAINMENT AREAS. — (1) Each area designated nonattainment for carbon monoxide pursuant to section lOlid) shall be classified at the time of such designation under table 1, by operation of law, as a Moderate Area or a Serious Area based on the design value for the area. The design value shall be calculated according to the interpretation methodology issued by the Administrator most recently before the date of the enactment of the Clean Air Act Amendments of 1990. For each area classified under this subsection, the primary standard attainment date for carbon monoxide shall be as expeditiously as practicable but not later than the date provided in table 1: "TABLE 3 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 "(2) At the time of publication of the notice required under 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
�
