Tex. Family Code § 51.09: WAIVER OF RIGHTS.

Unless a contrary intent clearly appears elsewhere in this title, any right granted to a child by this title or by the constitution or laws of this state or the United States may be waived in proceedings under this title if:

(1) the waiver is made by the child and the attorney for the child;

(2) the child and the attorney waiving the right are informed of and understand the right and the possible consequences of waiving it;

(3) the waiver is voluntary; and

(4) the waiver is made in writing or in court proceedings that are recorded.

Acts 1973, 63rd Leg., p. 1460, ch. 544, Sec. 1, eff. Sept. 1, 1973. Amended by Acts 1975, 64th Leg., p. 2154, ch. 693, Sec. 9, eff. Sept. 1, 1975; Acts 1989, 71st Leg., ch. 84, Sec. 1, eff. Sept. 1, 1989; Acts 1991, 72nd Leg., ch. 64, Sec. 1, eff. Sept. 1, 1991; Acts 1991, 72nd Leg., ch. 429, Sec. 1, eff. Sept. 1, 1991; Acts 1991, 72nd Leg., ch. 557, Sec. 1, eff. Sept. 1, 1991; Acts 1991, 72nd Leg., ch. 593, Sec. 1, eff. Aug. 26, 1991; Acts 1995, 74th Leg., ch. 262, Sec. 8, 9, eff. Jan. 1, 1996; Acts 1997, 75th Leg., ch. 1086, Sec. 4, eff. Sept. 1, 1997.