20 CFR § 416.1856
Who is considered a child
February 18, 2021
We consider you to be a child if—
(a)
(1) You are under 18 years old; or
(2) You are under 22 years old and you are a student regularly attending school or college or training that is designed to prepare you for a paying job;
(b) You are not married; and
(c) You are not the head of a household.