### Question
What is the definition of controlled substances?


### Answer
The definition of **controlled substances** is as follows in *23 U.S.C. § 410*:

> such term has under 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**

