### Question
How does the law define as expeditiously as practicable?


### Answer
Under *42 U.S.C. § 7491*, **as expeditiously as practicable** is defined as:

> as expeditiously as practicable but in no event later than five years after the date of approval of a plan revision under this section (or the date of promulgation of such a plan revision in the case of action by the Administrator under section 7410(c) of this title for purposes of this section)

#### Citation:
  - *42 U.S.C. § 7491*
  - Heading: **CHAPTER 83-ENERGY EXTENSION SERVICE > SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Part C-Prevention of Significant Deterioration of Air Quality > subpart ii-visibility protection**

