20 CFR §416.262

1. (a)You were 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 determining your eligibility for special SSI cash benefits as long as that month was not in a prior period of eligibility which has terminated according to §§ 416.1331 through 416.1335;
2. (b)In the month for which we are making the determination, your gross earned income exceeds the amount ordinarily considered to represent SGA under § 416.974(b)(2);
3. (c)You continue to have a disabling impairment; and
4. (d)[Reserved]
5. (e)You meet all the nondisability requirements for eligibility for SSI benefits (see § 416.202).