Page:United States Statutes at Large Volume 91.djvu/765

 PUBLIC LAW 95-95—AUG. 7, 1977

91 STAT. 731

regulation. The preceding sentence shall not apply with respect to any law or regulation of any State or political subdivision controlling the use of haiocarbons as propellants in aerosol spray containers.". PREVENTION OF SIGNIFICANT DETERIORATION

SEC. 127. (a) Title I of the Clean Air Act is amended by adding the following new part at the end thereof: "PART C—PREVENTION OF SIGNIFICANT DETERIORATION OF AIR QUALITY "SUBPART I "PURPOSES

42 USC 7470. "SEC. 160. The purposes of this part are as follows: "(1) to protect public health and welfare from any actual or potential adverse effect which in the Administrator's judgment may reasonably be anticipate to occur from air pollution or from exposures to pollutants in other media, which pollutants originate as emissions to the ambient air), notwithstanding attainment and maintenance of all national ambient air quality standards; " (2) to preserve, protect, and enhance the air quality in national parks, national wilderness areas, national monuments, national seashores, and other areas of special national or regional natural, recreational, scenic, or historic value; "(3) to insure that economic growth will occur in a manner consistent with the preservation of existing clean air resources; "(4) to assure that emissions from any source in any State will not interfere with any portion of the applicable implementation plan to prevent significant deterioration of air quality for any other State; and "(5) to assure that any decision to permit increased air pollution in any area to which this section applies is made only after careful evaluation of all the consequences of such a decision and after adequate procedural opportunities for informed public participation in the decisionmaking process. 'PLAN

REQUIREMENTS

"SEC. 161. In accordance with the policy of section 101(b)(1), each applicable implementation plan shall contain emission limitations and such other measures as may be necessary, as determined under regulations promulgated under this part, to prevent significant deterioration of air quality in each region (or portion thereof) identified pursuant to section 107(d)(1)(D) or (E).

Regulations. 42 USC 7471. 42 USC 7401.

Ante, p. 687.

" I N I T I A L CLASSIFICATIONS

"SEC. 162. (a) Upon the enactment of this part, all— 42 USC 7472. "(1) international parks, "(2) national wilderness areas which exceed 5,000 acres in size, "(3) national memorial parks which exceed 5,000 acres in size, and

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