### Question
How does the law define child?


### Answer
Under *42 U.S.C. § 290ff*, **child** is defined as:

> an individual not more than 21 years of age

#### Citation:
  - *42 U.S.C. § 290ff*
  - Heading: **CHAPTER 6A-PUBLIC HEALTH SERVICE > SUBCHAPTER III&ndash;A-SUBSTANCE ABUSE AND MENTAL HEALTH SERVICES ADMINISTRATION > Part E-Children With Serious Emotional Disturbances**

