### Question
How does the law define alternative method of compliance?


### Answer
Under *42 U.S.C. § 7651a*, **alternative method of compliance** is defined as:

> a method of compliance in accordance with one or more of the following authorities:


(A) a substitution plan submitted and approved in accordance with subsections [4](#7651a_4_target) 7651c(b) and (c) of this title

#### Citation:
  - *42 U.S.C. § 7651a*
  - Heading: **CHAPTER 85-AIR POLLUTION PREVENTION AND CONTROL > SUBCHAPTER IV&ndash;A-ACID DEPOSITION CONTROL**

