32 C.F.R. § 842.21
Who may file a claim
A claim may be filed by:
(a) A proper claimant.
(b) An authorized agent or legal representative of a proper claimant.
(c) A survivor of a deceased proper claimant in this order:
(1) Spouse.
(2) Children.
(3) Father or mother.
(4) Brothers or sisters.