Tex. Penal Code § 43.06: ACCOMPLICE WITNESS; TESTIMONY AND IMMUNITY.

(a) A party to an offense under this subchapter may be required to furnish evidence or testify about the offense.

(b) A party to an offense under this subchapter may not be prosecuted for any offense about which he is required to furnish evidence or testify, and the evidence and testimony may not be used against the party in any adjudicatory proceeding except a prosecution for aggravated perjury.

(c) For purposes of this section, "adjudicatory proceeding" means a proceeding before a court or any other agency of government in which the legal rights, powers, duties, or privileges of specified parties are determined.

(d) A conviction under this subchapter may be had upon the uncorroborated testimony of a party to the offense.

Acts 1973, 63rd Leg., p. 883, ch. 399, Sec. 1, eff. Jan. 1, 1974. Amended by Acts 1993, 73rd Leg., ch. 900, Sec. 1.01, eff. Sept. 1, 1994.