Section 7
SEC. 7. The several members of said Board, in the discharge of their duties, may examine witnesses under oath, and for this purpose the members may administer oaths to witnesses and take affidavits on any bearing, investigation, or inquiry as to rates required in the performance of their duties under this Act. In making examination of witnesses the members of the Board shall not be obliged to observe the technical rules of evidence. Any person who shall testily falsely or make any false affidavit or oath before the Board or before any of its members shall be guilty of perjury, and, upon conviction thereof in a court of competent jurisdiction, shall be punished as provided by law.