43 C.F.R. § 30.143

(a) Claims for care will not be allowed except upon clear and convincing evidence that the care was given on a promise of compensation and that compensation was expected.

(b) A claim will not be allowed if it:

(1) Has existed for such a period as to be barred by the applicable statute of limitations at the date of decedent's death;

(2) Is a tort claim that has not been reduced to judgment in a court of competent jurisdiction;

(3) Is unliquidated; or

(4) Is from a government entity and relates to payments for:

(i) General assistance, welfare, unemployment compensation or similar benefits; or

(ii) Social Security Administration supplemental security income or old-age, disability, or survivor benefits.