### Question
How does the law define phase I?


### Answer
Under *42 U.S.C. § 282*, **phase I** is defined as:

> given that term in section 312.21 of title 21, Code of Federal Regulations (or any successor regulation).

#### Citation:
  - *42 U.S.C. § 282*
  - Heading: **CHAPTER 6A-PUBLIC HEALTH SERVICE > SUBCHAPTER III-NATIONAL RESEARCH INSTITUTES > Part A-National Institutes of Health**

