### Question
How does the law define interchange?


### Answer
Under *16 U.S.C. § 521c*, **interchange** is defined as:

> a land transfer in which the Secretary and another person exchange titles to lands or interests in lands of approximately equal value where the Secretary finds that such a value determination can be made without a formal appraisal and under such regulations as the Secretary may prescribe

#### Citation:
  - *16 U.S.C. § 521c*
  - Heading: **CHAPTER 1B-ARCHAEOLOGICAL RESOURCES PROTECTION > SUBCHAPTER I-ESTABLISHMENT AND ADMINISTRATION**

