20 C.F.R. § 416.265
In order to be eligible for the special SSI eligibility status, you must have been eligible to receive a regular SSI benefit or a federally administered State supplementary payment (see § 416.2001) in a month before the month for which we are making the special SSI eligibility status determination. The month you were eligible for a regular SSI benefit or a federally administered State supplementary payment may not be in a prior period of eligibility which has been terminated according to §§ 416.1331 through 416.1335. For periods prior to May 1, 1991, you must be under age 65. Also, we must establish that:
[47 FR 15324, Apr. 9, 1982, as amended at 59 FR 41404, Aug. 12, 1994; 59 FR 49291, Sept. 27, 1994; 60 FR 8149, Feb. 10, 1995; 91 FR 16830, Apr. 3, 2026]