The manner in which any dispute shall be presented to the appeal tribunal, and the conduct of hearings and appeals, shall be in accordance with regulations prescribed by the commissioner 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 appeal tribunal proceedings. All testimony at any appeal tribunal hearing shall be recorded, but need not be transcribed unless further appeal is taken.