The manner in which appealed claims shall be presented and the conduct of hearings and appeals shall be in accordance with regulations prescribed by the Board of Review for determining the rights of the parties, whether or not such regulations conform to common law or statutory rules of evidence and other technical rules of procedure. A full and complete record shall be kept of all proceedings in connection with an appealed claim. The department's entire file relative to the appealed claim shall be a part of such record and shall be considered as evidence. All testimony at any hearing upon an appealed claim shall be recorded, but need not be transcribed unless the claim is further appealed.