PUBLIC LAW 101-549—NOV. 15, 1990 104 STAT. 2697 "(C) the promulgation of regulations under section 169A to address long range strategies for addressing regional haze which impairs visibility in affected class I areas. "(e) DUTIES OF THE ADMINISTRATOR. —(1) The Administrator shall, taking into account the studies pursuant to subsection (a)(1) and the reports pursuant to subsection (d)(2) and any other relevant information, within eighteen months of receipt of the report referred to in subsection (d)(2) of this section, carry out the Administrator's regulatory responsibilities under section 169A, including criteria for measuring 'reasonable progress' toward the national goal. "(2) Any regulations promulgated under section 169A of this title pursuant to this subsection shall require affected States to revise within 12 months their implementation plans under section 110 of this title to contain such emission limits, schedules of compliance, and other measures as may be necessary to carry out regulations promulgated pursuant to this subsection. "(f) GRAND CANYON VISIBILITY TRANSPORT COMMISSION.—The Administrator pursuant to subsection (c)(1) shall, within 12 months, establish a visibility transport commission for the region affecting the visibility of the Grand Canyon National Park.". SEC. 817. ROLE OF SECONDARY STANDARDS 42 USC 7409 (a) REPORT.— The Administrator shall request the National Academy of Sciences to prepare a report to the Congress on the role of national secondary ambient air quality standards in protecting welfare and the environment. The report shall: (1) include information on the effects on welfare and the environment which are caused by ambient concentrations of pollutants listed pursuant to section 108 and other pollutants which may be listed; (2) estimate welfare and environmental costs incurred as a result of such effects; (3) examine the role of secondary standards and the State implementation planning process in preventing such effects; (4) determine ambient concentrations of each such pollutant which would be adequate to protect welfare and the environment from such effects; (5) estimate the costs and other impacts of meeting secondary standards; and (6) consider other means consistent with the goals and objectives of the Clean Air Act which may be more effective than secondary standards in preventing or mitigating such effects. (b) SUBMISSION TO CONGRESS; COMMENTS; AUTHORIZATION. —(1) The report shall be transmitted to the Congress not later than 3 years after the date of enactment of the Clean Air Act Amendments of 1990. (2) At least 90 days before issuing a report the Administrator shall provide an opportunity for public comment on the proposed report. The Administrator shall include in the final report a summary of the comments received on the proposed report. (3) There are authorized to be appropriated such sums as are necessary to carry out this section. SEC. 818. INTERNATIONAL BORDER AREAS. Subpart 1 of part D of title I of the Clean Air Act is amended by adding at the end thereof the following new section:
�
