NOTE: DWB Reg-Basis codes F1-1578, F2-1578, E1-1577 through E4-1577 were used for DWB
cases processed prior to January 1991. Section 5103 of P.L. 101-508 changed the disability
standard for disabled widow(er)s and surviving divorced spouses to conform to the
disability standard for disabled wage earners. See DI 11015.001B. and DI 10110.001B.
See NL 00708.100 for a listing of the paragraphs shown in the chart above. The listing is in numerical
order and contains text for each paragraph listed.