### Question
How does the law define per unit distribution costs?


### Answer
Under *42 U.S.C. § 6344*, **per unit distribution costs** is defined as:

> (in kilowatt hours) the quotient obtained by dividing—


(i) the depreciated book-value distribution system costs of a utility

#### Citation:
  - *42 U.S.C. § 6344*
  - Heading: **CHAPTER 77-ENERGY CONSERVATION > SUBCHAPTER III-IMPROVING ENERGY EFFICIENCY > Part C-Industrial Energy Efficiency**

