About GPO   |   Newsroom/Media   |   Congressional Relations   |   Inspector General   |   Careers   |   Contact   |   askGPO   |   Help  
Home   |   Customers   |   Vendors   |   Libraries  
The Code of Federal Regulations (CFR) annual edition is the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government produced by the Office of the Federal Register (OFR) and the Government Publishing Office.

Parallel Table of Authorities and Rules for the Code of Federal Regulations and the United States Code
Text | PDF

Find, review, and submit comments on Federal rules that are open for comment and published in the Federal Register using Regulations.gov.

Purchase individual CFR titles from the U.S. Government Online Bookstore.

Find issues of the CFR (including issues prior to 1996) at a local Federal depository library.


Electronic Code of Federal Regulations

e-CFR data is current as of April 20, 2015

Title 40Chapter ISubchapter CPart 51Subpart Z → §51.1012

Title 40: Protection of Environment
Subpart Z—Provisions for Implementation of PM2.5 National Ambient Air Quality Standards

§51.1012   Requirement for contingency measures.

Consistent with section 172(c)(9) of the Act, the State must submit in each attainment plan specific contingency measures to be undertaken if the area fails to make reasonable further progress, or fails to attain the PM2.5 NAAQS by its attainment date. The contingency measures must take effect without significant further action by the State or EPA.

Need assistance?