Each officer who serves subpoenas on behalf of the Insurance Commissioner shall receive the same fee as a sheriff and each witness who appears in obedience to a subpoena before the Insurance Commissioner or duly appointed employee shall receive for his or her attendance the fees and mileage provided for witnesses in civil cases in the circuit court if the witness was subpoenaed without the request of either claimant or employer at the instance of the Insurance Commissioner or duly appointed employee. The witness fees and mileage of any witness subpoenaed by, or at the instance of, either claimant or employer shall be paid by the party who subpoenas the witness.