### Question
What does controlled substance mean?


### Answer
**Controlled substance** has the following meaning in *19 U.S.C. § 1401*:

> given that term in section 802(6) of title 21. For purposes of this chapter, a controlled substance shall be treated as merchandise the importation of which into the United States is prohibited, unless the importation is authorized under—


(1) an appropriate license or permit; 

#### Citation:
  - *19 U.S.C. § 1401*
  - Heading: **CHAPTER 3-THE TARIFF AND RELATED PROVISIONS > SUBTITLE III-ADMINISTRATIVE PROVISIONS > Part I-Definitions and National Customs Automation Program > subpart a-definitions**

