### Question
How does the law define interstate commerce?


### Answer
Under *42 U.S.C. § 289g*, **interstate commerce** is defined as:

> given such term in section 321(b) of title 21.

#### Citation:
  - *42 U.S.C. § 289g*
  - Heading: **CHAPTER 6A-PUBLIC HEALTH SERVICE > SUBCHAPTER III-NATIONAL RESEARCH INSTITUTES > Part H-General Provisions**

