20 CFR 416.920a : Employees' Benefits (§ 1.1 To Parts 1011-1099) — (Part 400 To Part 499) — Social Security Administration (Part 400 To Part 499) — Supplemental Security Income For The Aged, Blind, And Disabled (§ 416.101 To § 416.2227) — Determining Disability And Blindness (§ 416.901 To § 416.999D) — Evaluation Of Disability (§ 416.920 To § 416.924B) — Evaluation of mental impairments.