Reconsideration of an appellate decision may be accorded at any time by the Board of Veterans' Appeals on motion by the appellant or his or her representative or on the Board's own motion:

(a) Upon allegation of obvious error of fact or law;

(b) Upon discovery of new evidence in the form of relevant records or reports of the service department concerned; or

(c) Upon allegation 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.