Tex. Tax Code § 154.021
(b) The tax rates are:
Acts 1981, 67th Leg., p. 1640, ch. 389, Sec. 1, eff. Jan. 1, 1982.
Amended by Acts 1984, 68th Leg., 2nd C.S., ch. 31, art. 2, Sec. 1, eff. Aug. 1, 1984, Sec. 2, eff. Sept. 1, 1985;
Acts 1987, 70th Leg., 2nd C.S., ch. 5, art. 4, Sec. 1;
Acts 1990, 71st Leg., 6th C.S., ch. 5, Sec. 2.01, eff. July 1, 1990.
Acts 2006, 79th Leg., 3rd C.S., Ch. 7 (H.B. 5), Sec. 1, eff. January 1, 2007.