[Code of Federal Regulations]
[Title 40, Volume 3]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR52.20]

[Page 13]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 52--APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS--Table of Contents
 
                      Subpart A--General Provisions
 
Sec. 52.20  Attainment dates for national standards.

    Each subpart contains a section which specifies the latest dates by 
which national standards are to be attained in each region in the State. 
An attainment date which only refers to a month and a year (such as July 
1975) shall be construed to mean the last day of the month in question. 
However, the specification of attainment dates for national standards 
does not relieve any State from the provisions of subpart N of this 
chapter which require all sources and categories of sources to comply 
with applicable requirements of the plan--
    (a) As expeditiously as practicable where the requirement is part of 
a control strategy designed to attain a primary standard, and
    (b) Within a reasonable time where the requirement is part of a 
control strategy designed to attain a secondary standard.

[37 FR 19808, Sept. 22, 1972, as amended at 39 FR 34535, Sept. 26, 1974; 
51 FR 40676, Nov. 7, 1986]