Tex. Nat. Res. Code § 21.077
The unit of measurement in this subchapter has the following values, based on the International Meter established by the National Bureau of Standards:
Acts 1977, 65th Leg., p. 2359, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.
Acts 2021, 87th Leg., R.S., Ch. 381 (S.B. 1072), Sec. 3, eff. September 1, 2021.