(a) At the hearing on the petition, the commissioners court shall:
(1) consider the petition and hear all testimony for or against its provisions; and
(2) determine whether the drainage system proposed by the petition is necessary or advisable for the public benefit.
(b) If the court approves the petition, the court shall:
(1) order the decision entered into the court's minutes and made part of the record; and
(2) enter into the minutes whether notice was properly served.
(c) The court's order is final if notice was properly served.
(d) If the court disapproves the petition for the drainage system, the court may not hear another application for the drainage system before the first anniversary of the date of disapproval.