The commissioner shall notify the public employee or public official immediately by registered or certified mail when the public employee’s or public official’s bond, or coverage under a blanket bond, is ordered canceled, and the public employee or public official shall have twenty days after the receipt of such notice within which to take an appeal from the decision of the commissioner to the district court of the judicial district in which the public employee or public official resides. The court shall hear such appeal at a day to be fixed by the judge thereof not less than ten days nor more than thirty days after the filing of the appeal with the clerk. Notice of such appeal must be served by the appellant upon the commissioner. The case must be tried by the court without a jury.