### Question
How is the "controlled substance" defined?


### Answer
The term **controlled substance** is defined in *42 U.S.C. § 1437d* as follows -

> given the term in section 802 of title 21.

#### Citation:
  - *42 U.S.C. § 1437d*
  - Heading: **CHAPTER 8-LOW-INCOME HOUSING > SUBCHAPTER I-GENERAL PROGRAM OF ASSISTED HOUSING**

