Sec. 24.004.  SPECIAL JUDGE BY AGREEMENT OF PARTIES.  If the parties agree on a special judge for the trial of a particular case, the clerk shall enter in the minutes of the court, as a part of the proceedings in the case, a record showing:
(1)  that the judge of the court is disqualified to try the case;
(2)  the name of the special judge and that the parties agreed on the selection of that judge for the trial of the case;  and
(3)  that the oath prescribed by law was administered to the special judge.
Acts 1985, 69th Leg., ch. 480, Sec. 1, eff. Sept. 1, 1985.