20 CFR § 416.982
Blindness under a State plan
February 18, 2021
We shall also consider you blind for the purposes of payment of supplemental security income benefits if—
(a) You were found to be blind as defined under a State plan approved under title X or title XVI of the Social Security Act, as in effect for October 1972;
(b) You received aid under the State plan because of your blindness for the month of December 1973; and
(c) You continue to be blind as defined under the State plan.