Claim of a mother for the benefits to which she may be entitled by reason of her unmarried status as outlined in section 202(c) or section 312(c) 3 of the Act, as amended, shall be supported by a statement of fact, under oath, of such status, together with one of the following:
(a)
Certified copy of public record of death of the husband.
(b)
Certified copy of court record of divorce decree.