The administrative law judge is vested with general authority to conduct the hearing in an orderly and judicial manner, including authority to subpoena witnesses and to take and cause depositions to be taken for the purpose of taking testimony but not for discovery in accordance with the Act of January 31, 1903 (32 Stat. 790; 43 U.S.C. 102 106), to administer oaths, to call and question witnesses, to make proposed findings of fact and to take such other actions in connection with the hearing as may be prescribed by the Board in referring the case for hearing. The issuance of subpoenas, the attendance of witnesses, and the taking of depositions shall be governed by section 4.423, and section 4.26 of the general rules of Subpart B of this part.