37 C.F.R. § 42.7

Management of the record.

(a) The Board may expunge any paper directed to a proceeding or filed while an application or patent is under the jurisdiction of the Board that is not authorized under this part or in a Board order or that is filed contrary to a Board order.

(b) The Board may vacate or hold in abeyance any non-Board action directed to a proceeding while an application or patent is under the jurisdiction of the Board unless the action was authorized by the Board.