20 CFR 416.1870: Effect of being considered a student.

If we consider you to be a student, we will not count all of your earned income when we determine your SSI eligibility and benefit amount. If you are an ineligible spouse or ineligible parent for deeming purposes and we consider you to be a student, we will not count all of your income when we determine how much of your income to deem. Section 416.1110 explains what we mean by earned income. Section 416.1112(c)(3) explains how much of your earned income we will not count. Section 416.1161(a)(27) explains how the student earned income exclusion applies to deemors.