38 C.F.R. § 20.715
(a) Notification.
(1) The Board must notify the appellant and his or her representative in writing in the event the Board discovers that a Board hearing has not been recorded in whole or in part due to equipment failure or other cause, or the official transcript of the hearing is lost or destroyed and the recording upon which it was based is no longer available. The notice must provide the appellant with a choice of either of the following options:
(b) Board decision issued prior to a loss of the recording or transcript. The Board will not accept a request for a new Board hearing under this section if a Board decision was issued on an appeal prior to the loss of the recording or transcript of a Board hearing, and the Board decision considered testimony provided at that Board hearing.
(Authority: 38 U.S.C. 7102, 7105(a), 7107)
[84 FR 188, Jan. 18, 2019]