### Question
How is the term necessary preconstruction approvals or permits defined?


### Answer
The term **necessary preconstruction approvals or permits** is defined in *42 U.S.C. § 7479* as the following:

> those permits or approvals, required by the permitting authority as a precondition to undertaking any activity under clauses (i) or (ii) of subparagraph (A) of this paragraph

#### Citation:
  - *42 U.S.C. § 7479*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Part C-Prevention of Significant Deterioration of Air Quality > subpart i-clean air**

