38 C.F.R. § 20.1000
An appellate decision may be vacated by the Board of Veterans' Appeals at any time upon request of the appellant or his or her representative, or on the Board's own motion, on the following grounds:
(a) Denial of due process. Examples of circumstances in which denial of due process of law will be conceded are:
(b) Allowance of benefits based on false or fraudulent evidence. Where it is determined on reconsideration that an allowance of benefits by the Board has been materially influenced by false or fraudulent evidence submitted by or on behalf of the appellant, the prior decision will be vacated only with respect to the issue or issues to which, within the judgment of the Board, the false or fraudulent evidence was material.
(Authority: 38 U.S.C. 7104(a))
[57 FR 4109, Feb. 3, 1992. Redesignated and amended at 84 FR 177, 191, Jan. 18, 2019, as amended at 84 FR 4337, Feb. 15, 2019]