Except in his report to the public utilities commission or when called on to testify in any court or proceeding of the public utilities commission, no employee or agent referred to in section 4905.13 of the Revised Code shall divulge any information acquired by him in respect to the transaction, property, or business of any public utility, while acting or claiming to act as such employee or agent. Whoever violates this section shall be disqualified from acting as agent, or acting in any other capacity under the appointment or employment of the commission.