### Question
Can you define what illegal drug means?


### Answer
**Illegal drug** is defined as the following in *20 U.S.C. § 1415*:

> a controlled substance but does not include a controlled substance that is legally possessed or used under the supervision of a licensed health-care professional or that is legally possessed or used under any other authority under that Act [21 U.S.C. 801 et seq.] or under any other provision of Federal law

#### Citation:
  - *20 U.S.C. § 1415*
  - Heading: **CHAPTER 33-EDUCATION OF INDIVIDUALS WITH DISABILITIES > SUBCHAPTER II-ASSISTANCE FOR EDUCATION OF ALL CHILDREN WITH DISABILITIES**

