20 C.F.R. § 416.932
We may make payments to you on the basis of presumptive disability or presumptive blindness before we make a formal determination about your disability or blindness. The payments can not be made for more than 6 months. They start for a period of not more than 6 months beginning in the month we make the presumptive disability or presumptive blindness finding. The payments end the earliest of—
[45 FR 55621, Aug. 20, 1980, as amended at 57 FR 53853, Nov. 13, 1992]