20 C.F.R. § 416.221 Who is a qualified individual.
Title 20 - Employees' Benefits
You are a qualified individual if— (a) You received aid or assistance for the month of December 1973 under a State plan approved under title I, X, XIV, or XVI (AABD) of the Act; (b) The State took into account the needs of another person in deciding your need for the State assistance for December 1973; (c) That other person was living in your home in December 1973; and (d) That other person was not eligible for State assistance for December 1973.
Title 20: Employees' Benefits
PART 416—SUPPLEMENTAL SECURITY INCOME FOR THE AGED, BLIND, AND DISABLED
Subpart B—Eligibility
Eligibility for Increased Benefits Because of Essential Persons
§ 416.221 Who is a qualified individual.