(a) The county commissioners or county council or circuit court for the county in which proceedings are pending may, on application of any party and at any time before a final decision is made, grant leave to the party to amend the petition or any part of the proceedings that may be defective or informal to bring the merits of the case before the county commissioners or county council for a decision or before a jury of the circuit court for trial.

(b) The county commissioners or county council or circuit court for the county may award costs.