Sec. 51.024.  SINGLE-COUNTY DISTRICT:  HEARING IN DISTRICT COURT;  PROCEDURE.  (a)  The district court, either in term time or in vacation time, shall schedule the appeal for hearing with all reasonable dispatch.
(b)  In the proceeding in the district court, formal pleadings shall not be required but, with the court's permission, may be filed.
(c)  The trial and decision shall be by the court without the intervention of a jury, and the hearing shall be conducted as though the jurisdiction of the district court were original jurisdiction.
(d)  The following matters may be contested in the district court:
(1)  all matters which were or might have been presented in the commissioners court;
(2)  the validity of the act under which the district is proposed to be created;  and
(3)  the regularity of all previous proceedings.
Acts 1971, 62nd Leg., p. 110, ch. 58, Sec. 1, eff. Aug. 30, 1971.  Amended by Acts 1981, 67th Leg., p. 2646, ch. 707, Sec. 4(43), eff. Aug. 31, 1981.