CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 51—REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS > SUBPART Z—Provisions for Implementation of PM2 . 5 National Ambient Air Quality Standards (§51.1000 to §51.1012) > 51.1012—Requirement for contingency measures.

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.