
From the U.S. Code Online via GPO Access
[wais.access.gpo.gov]
[Laws in effect as of January 23, 2000]
[Document not affected by Public Laws enacted between
  January 23, 2000 and December 4, 2001]
[CITE: 42USC7472]

 
                 TITLE 42--THE PUBLIC HEALTH AND WELFARE
 
            CHAPTER 85--AIR POLLUTION PREVENTION AND CONTROL
 
                  SUBCHAPTER I--PROGRAMS AND ACTIVITIES
 
     Part C--Prevention of Significant Deterioration of Air Quality
 
                          subpart i--clean air
 
Sec. 7472. Initial classifications


(a) Areas designated as class I

    Upon the enactment of this part, all--
        (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
        (4) national parks which exceed six thousand acres in size,

and which are in existence on August 7, 1977, shall be class I areas and 
may not be redesignated. All areas which were redesignated as class I 
under regulations promulgated before August 7, 1977, shall be class I 
areas which may be redesignated as provided in this part. The extent of 
the areas designated as Class I under this section shall conform to any 
changes in the boundaries of such areas which have occurred subsequent 
to August 7, 1977, or which may occur subsequent to November 15, 1990.

(b) Areas designated as class II

    All areas in such State designated pursuant to section 7407(d) of 
this title as attainment or unclassifiable which are not established as 
class I under subsection (a) of this section shall be class II areas 
unless redesignated under section 7474 of this title.

(July 14, 1955, ch. 360, title I, Sec. 162, as added Pub. L. 95-95, 
title I, Sec. 127(a), Aug. 7, 1977, 91 Stat. 731; amended Pub. L. 95-
190, Sec. 14(a)(40), Nov. 16, 1977, 91 Stat. 1401; Pub. L. 101-549, 
title I, Secs. 108(m), 110(2), Nov. 15, 1990, 104 Stat. 2469, 2470.)


                               Amendments

    1990--Subsec. (a). Pub. L. 101-549, Sec. 108(m), inserted at end 
``The extent of the areas designated as Class I under this section shall 
conform to any changes in the boundaries of such areas which have 
occurred subsequent to August 7, 1977, or which may occur subsequent to 
November 15, 1990.''
    Subsec. (b). Pub. L. 101-549, Sec. 110(2), substituted ``designated 
pursuant to section 7407(d) of this title as attainment or 
unclassifiable'' for ``identified pursuant to section 7407(d)(1)(D) or 
(E) of this title''.
    1977--Subsec. (a)(4). Pub. L. 95-190 inserted a comma after 
``size''.

                  Section Referred to in Other Sections

    This section is referred to in sections 7474, 7478 of this title.
