Tex. Agric. Code § 63.0025
A representative laboratory analysis conducted for purposes of fulfilling a requirement established by a federal agency or a state agency other than the department may not:
(1) be considered a guarantee of nutrient levels for:
Added by Acts 2011, 82nd Leg., R.S., Ch. 779 (H.B. 1969), Sec. 3, eff. September 1, 2011.