The commission, or its duly authorized representative, shall have free access to all the books and papers of the corporation or person which relate to its business and to the books and papers kept by any of its agents, and may administer oaths to and examine as witnesses the directors, officers, and agents of said corporation or person, and any individual or the members of any copartnership or association licensed hereunder, and any other person, relative to its affairs, transactions and condition.
7 P.S. § 6058