45 CFR § 1150.4 - What types of claims are excluded from these regulations?
(a) The regulations in this part do not apply to any claim as to which there is an indication of fraud or misrepresentation, as described in the Federal Claims Collection Standards, unless returned to the Endowment by the DOJ for handling.
(b) The regulations in this subpart, subpart B, and subpart D do not apply to debts arising under the Internal Revenue Code of 1986, as amended (26 U.S.C. 1 et seq.); the Social Security Act (42 U.S.C. 301 et seq.); and the tariff laws of the United States.
(c) Remedies and procedures described in this part may be authorized with respect to claims that are exempt from the Debt Collection Act of 1982 and the Debt Collection Improvement Act of 1996, to the extent that they are authorized under some other statute or the common law.