### Question
How is the term controlled substances defined?


### Answer
The term **controlled substances** is defined in *23 U.S.C. § 410* as the following:

> given such term in section 102(6) of the Controlled Substances Act (21 U.S.C. 802(6)).

#### Citation:
  - *23 U.S.C. § 410*
  - Heading: **CHAPTER 4-HIGHWAY SAFETY**

