### Question
How is the "Indian tribe" defined?


### Answer
The term **Indian tribe** is defined in *43 U.S.C. § 2421* as follows -

> given the term in section 450b of title 25.

#### Citation:
  - *43 U.S.C. § 2421*
  - Heading: **CHAPTER 42-RURAL WATER SUPPLY > SUBCHAPTER II-TWENTY-FIRST CENTURY WATER WORKS**

