§404.367. When you are a “full-time elementary or secondary school student”. — Inbound Citations

(5) You are under age 18; you are 18 years old or older and have a disability that began before you became 22 years old; or you are 18 years or older and qualify for benefits as a full-time student as described in § 404.367.

(a) (See § 404.367.)