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.
Subpart AA_Provisions for Implementation of the 2008 Ozone National
Ambient Air Quality Standards
Source: 77 FR 30170, May 21, 2012, unless otherwise noted.