20 C.F.R. § 404.1350
(a) When deemed insured status applies. If you are the survivor of a World War II veteran, we consider the veteran to have died fully insured as discussed in § 404.111 and we include wage credits in determining your monthly benefit or lump-sum death payment if—
(b) Amount of credit given for deemed insured World War II veterans.
(1) When we compute a survivor's benefit or lump-sum death payment, we give credit for—