The judge of a court hearing a proceeding under this chapter shall inform the clerk of the court as to a decision by the special commissioners on the day the decision is filed or on the next working day after the day the decision is filed. Not later than the next working day after the day the decision is filed, the clerk shall send notice of the decision by certified or registered United States mail, return receipt requested, to the parties in the proceeding, or to their attorneys of record, at their addresses of record.