20 C.F.R. § 416.261
Special SSI cash benefits are benefits that we may pay you in lieu of regular SSI benefits because your gross earned income in a month of initial eligibility for regular SSI benefits exceeds the amount ordinarily considered to represent SGA under § 416.974(b)(2) . You must meet the eligibility requirements in § 416.262 in order to receive special SSI cash benefits. Special SSI cash benefits are not payable for any month in which your countable income exceeds the limits established for the SSI program (see subpart K of this part). If you are eligible for special SSI cash benefits, we consider you to be a disabled individual receiving SSI benefits for purposes of eligibility for Medicaid. We compute the amount of special SSI cash benefits according to the rules in subpart D of this part. If your State makes supplementary payments which we administer under a Federal-State agreement, and if your State elects to supplement the special SSI cash benefits, the rules in subpart T of this part will apply to these payments.
20 C.F.R. §416.261