Each witness who appears before the director or administrative law judge in response to a subpoena shall receive the same fee and mileage as is provided for witnesses attending district courts in civil cases in this state. The director or the administrative law judge, whoever is conducting the hearing, shall tax and apportion the costs of such witness fees in the discretion of the director or the administrative law judge, as the case may be, and shall make such orders relative to the payment of such fees as the director or the administrative law judge deems expedient in order to secure and provide for the payment of the witness fees.